/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.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:04:23,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:04:23,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:04:23,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:04:23,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:04:23,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:04:23,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:04:23,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:04:23,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:04:23,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:04:23,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:04:23,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:04:23,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:04:23,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:04:23,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:04:23,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:04:23,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:04:23,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:04:23,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:04:23,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:04:23,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:04:23,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:04:23,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:04:23,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:04:23,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:04:23,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:04:23,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:04:23,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:04:23,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:04:23,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:04:23,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:04:23,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:04:23,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:04:23,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:04:23,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:04:23,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:04:23,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:04:23,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:04:23,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:04:23,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:04:23,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:04:23,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:04:23,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:04:23,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:04:23,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:04:23,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:04:23,330 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:04:23,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:04:23,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:04:23,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:04:23,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:04:23,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:04:23,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:04:23,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:04:23,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:04:23,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:04:23,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:04:23,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:04:23,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:04:23,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:04:23,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:04:23,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:04:23,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:04:23,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:04:23,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:04:23,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:04:23,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:04:23,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:04:23,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:04:23,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:04:23,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:04:23,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:04:23,866 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:04:23,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:04:23,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce0504c7/d461d5c4fa8847d5948326982ebce42a/FLAG32a3778df [2020-12-22 08:04:24,688 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:04:24,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:04:24,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce0504c7/d461d5c4fa8847d5948326982ebce42a/FLAG32a3778df [2020-12-22 08:04:24,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce0504c7/d461d5c4fa8847d5948326982ebce42a [2020-12-22 08:04:24,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:04:24,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:04:24,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:24,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:04:24,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:04:24,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:24" (1/1) ... [2020-12-22 08:04:24,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:24, skipping insertion in model container [2020-12-22 08:04:24,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:24" (1/1) ... [2020-12-22 08:04:25,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:04:25,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:04:25,433 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.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14015,14028] [2020-12-22 08:04:25,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:25,539 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:04:25,750 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.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14015,14028] [2020-12-22 08:04:25,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:25,828 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:04:25,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25 WrapperNode [2020-12-22 08:04:25,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:25,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:25,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:04:25,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:04:25,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:25,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:04:25,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:04:25,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:04:25,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:25,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:26,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:26,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (1/1) ... [2020-12-22 08:04:26,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:04:26,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:04:26,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:04:26,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:04:26,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (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 08:04:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:04:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:04:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:04:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:04:28,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:04:28,149 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:04:28,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:28 BoogieIcfgContainer [2020-12-22 08:04:28,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:04:28,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:04:28,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:04:28,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:04:28,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:04:24" (1/3) ... [2020-12-22 08:04:28,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d95e54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:28, skipping insertion in model container [2020-12-22 08:04:28,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:25" (2/3) ... [2020-12-22 08:04:28,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d95e54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:28, skipping insertion in model container [2020-12-22 08:04:28,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:28" (3/3) ... [2020-12-22 08:04:28,162 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:04:28,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:04:28,175 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:04:28,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:04:28,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:04:28,228 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:04:28,229 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:04:28,229 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:04:28,229 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:04:28,229 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:04:28,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:04:28,229 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:04:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2020-12-22 08:04:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:04:28,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:28,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:28,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash 811765820, now seen corresponding path program 1 times [2020-12-22 08:04:28,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:28,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889432962] [2020-12-22 08:04:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:28,989 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 08:04:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889432962] [2020-12-22 08:04:28,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:28,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443440954] [2020-12-22 08:04:29,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:29,030 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2020-12-22 08:04:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:29,416 INFO L93 Difference]: Finished difference Result 634 states and 1113 transitions. [2020-12-22 08:04:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:29,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:04:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:29,441 INFO L225 Difference]: With dead ends: 634 [2020-12-22 08:04:29,441 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 08:04:29,446 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 08:04:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 08:04:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2020-12-22 08:04:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-12-22 08:04:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 757 transitions. [2020-12-22 08:04:29,572 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 757 transitions. Word has length 146 [2020-12-22 08:04:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:29,575 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 757 transitions. [2020-12-22 08:04:29,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 757 transitions. [2020-12-22 08:04:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:04:29,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:29,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:29,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:04:29,588 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1665088068, now seen corresponding path program 1 times [2020-12-22 08:04:29,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:29,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245736750] [2020-12-22 08:04:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:29,900 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 08:04:29,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245736750] [2020-12-22 08:04:29,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:29,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466471388] [2020-12-22 08:04:29,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:29,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:29,904 INFO L87 Difference]: Start difference. First operand 508 states and 757 transitions. Second operand 3 states. [2020-12-22 08:04:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:30,102 INFO L93 Difference]: Finished difference Result 1104 states and 1692 transitions. [2020-12-22 08:04:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:30,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:04:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:30,115 INFO L225 Difference]: With dead ends: 1104 [2020-12-22 08:04:30,116 INFO L226 Difference]: Without dead ends: 894 [2020-12-22 08:04:30,122 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 08:04:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-12-22 08:04:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 892. [2020-12-22 08:04:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-12-22 08:04:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1341 transitions. [2020-12-22 08:04:30,190 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1341 transitions. Word has length 146 [2020-12-22 08:04:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:30,192 INFO L481 AbstractCegarLoop]: Abstraction has 892 states and 1341 transitions. [2020-12-22 08:04:30,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1341 transitions. [2020-12-22 08:04:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:04:30,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:30,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:30,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:04:30,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2001145712, now seen corresponding path program 1 times [2020-12-22 08:04:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:30,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865667281] [2020-12-22 08:04:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:30,530 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 08:04:30,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865667281] [2020-12-22 08:04:30,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:30,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240585202] [2020-12-22 08:04:30,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:30,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:30,534 INFO L87 Difference]: Start difference. First operand 892 states and 1341 transitions. Second operand 4 states. [2020-12-22 08:04:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:30,795 INFO L93 Difference]: Finished difference Result 2611 states and 3916 transitions. [2020-12-22 08:04:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:30,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 08:04:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:30,809 INFO L225 Difference]: With dead ends: 2611 [2020-12-22 08:04:30,809 INFO L226 Difference]: Without dead ends: 1728 [2020-12-22 08:04:30,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2020-12-22 08:04:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2020-12-22 08:04:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2020-12-22 08:04:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2568 transitions. [2020-12-22 08:04:30,927 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2568 transitions. Word has length 146 [2020-12-22 08:04:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:30,927 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states and 2568 transitions. [2020-12-22 08:04:30,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2568 transitions. [2020-12-22 08:04:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:04:30,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:30,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:30,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:04:30,932 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash -153017852, now seen corresponding path program 1 times [2020-12-22 08:04:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:30,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128998195] [2020-12-22 08:04:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:31,083 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 08:04:31,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128998195] [2020-12-22 08:04:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:31,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:31,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523017036] [2020-12-22 08:04:31,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:31,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:31,089 INFO L87 Difference]: Start difference. First operand 1726 states and 2568 transitions. Second operand 3 states. [2020-12-22 08:04:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:31,293 INFO L93 Difference]: Finished difference Result 5140 states and 7642 transitions. [2020-12-22 08:04:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:31,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 08:04:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:31,316 INFO L225 Difference]: With dead ends: 5140 [2020-12-22 08:04:31,316 INFO L226 Difference]: Without dead ends: 3442 [2020-12-22 08:04:31,321 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 08:04:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2020-12-22 08:04:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 1728. [2020-12-22 08:04:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2020-12-22 08:04:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2570 transitions. [2020-12-22 08:04:31,486 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2570 transitions. Word has length 147 [2020-12-22 08:04:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:31,486 INFO L481 AbstractCegarLoop]: Abstraction has 1728 states and 2570 transitions. [2020-12-22 08:04:31,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2570 transitions. [2020-12-22 08:04:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:04:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:31,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:31,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:04:31,492 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1214315247, now seen corresponding path program 1 times [2020-12-22 08:04:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:31,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926212533] [2020-12-22 08:04:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:31,846 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 08:04:31,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926212533] [2020-12-22 08:04:31,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:31,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:31,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086034794] [2020-12-22 08:04:31,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:31,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:31,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:31,849 INFO L87 Difference]: Start difference. First operand 1728 states and 2570 transitions. Second operand 4 states. [2020-12-22 08:04:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:32,202 INFO L93 Difference]: Finished difference Result 5036 states and 7470 transitions. [2020-12-22 08:04:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:32,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-12-22 08:04:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:32,221 INFO L225 Difference]: With dead ends: 5036 [2020-12-22 08:04:32,222 INFO L226 Difference]: Without dead ends: 3338 [2020-12-22 08:04:32,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-12-22 08:04:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-12-22 08:04:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-12-22 08:04:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4908 transitions. [2020-12-22 08:04:32,560 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4908 transitions. Word has length 148 [2020-12-22 08:04:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:32,560 INFO L481 AbstractCegarLoop]: Abstraction has 3336 states and 4908 transitions. [2020-12-22 08:04:32,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4908 transitions. [2020-12-22 08:04:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:04:32,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:32,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:32,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:04:32,568 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:32,569 INFO L82 PathProgramCache]: Analyzing trace with hash 568493541, now seen corresponding path program 1 times [2020-12-22 08:04:32,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:32,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807726066] [2020-12-22 08:04:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:32,667 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 08:04:32,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807726066] [2020-12-22 08:04:32,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:32,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:32,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507462111] [2020-12-22 08:04:32,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:32,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:32,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:32,672 INFO L87 Difference]: Start difference. First operand 3336 states and 4908 transitions. Second operand 3 states. [2020-12-22 08:04:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:33,134 INFO L93 Difference]: Finished difference Result 9932 states and 14604 transitions. [2020-12-22 08:04:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:33,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 08:04:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:33,168 INFO L225 Difference]: With dead ends: 9932 [2020-12-22 08:04:33,168 INFO L226 Difference]: Without dead ends: 6640 [2020-12-22 08:04:33,174 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 08:04:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2020-12-22 08:04:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 3340. [2020-12-22 08:04:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3340 states. [2020-12-22 08:04:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4912 transitions. [2020-12-22 08:04:33,495 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4912 transitions. Word has length 149 [2020-12-22 08:04:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:33,495 INFO L481 AbstractCegarLoop]: Abstraction has 3340 states and 4912 transitions. [2020-12-22 08:04:33,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4912 transitions. [2020-12-22 08:04:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:04:33,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:33,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:33,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:04:33,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1727483410, now seen corresponding path program 1 times [2020-12-22 08:04:33,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:33,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659237367] [2020-12-22 08:04:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:33,765 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 08:04:33,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659237367] [2020-12-22 08:04:33,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:33,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:33,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351445791] [2020-12-22 08:04:33,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:33,779 INFO L87 Difference]: Start difference. First operand 3340 states and 4912 transitions. Second operand 4 states. [2020-12-22 08:04:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:34,296 INFO L93 Difference]: Finished difference Result 9071 states and 13289 transitions. [2020-12-22 08:04:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:34,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 08:04:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:34,326 INFO L225 Difference]: With dead ends: 9071 [2020-12-22 08:04:34,326 INFO L226 Difference]: Without dead ends: 5779 [2020-12-22 08:04:34,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5779 states. [2020-12-22 08:04:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5779 to 5777. [2020-12-22 08:04:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5777 states. [2020-12-22 08:04:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 8367 transitions. [2020-12-22 08:04:34,805 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 8367 transitions. Word has length 150 [2020-12-22 08:04:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:34,805 INFO L481 AbstractCegarLoop]: Abstraction has 5777 states and 8367 transitions. [2020-12-22 08:04:34,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 8367 transitions. [2020-12-22 08:04:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 08:04:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:34,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:34,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:04:34,817 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 982054470, now seen corresponding path program 1 times [2020-12-22 08:04:34,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:34,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150602987] [2020-12-22 08:04:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:34,886 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 08:04:34,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150602987] [2020-12-22 08:04:34,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:34,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:34,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720555657] [2020-12-22 08:04:34,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:34,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:34,890 INFO L87 Difference]: Start difference. First operand 5777 states and 8367 transitions. Second operand 3 states. [2020-12-22 08:04:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:35,673 INFO L93 Difference]: Finished difference Result 16923 states and 24559 transitions. [2020-12-22 08:04:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:35,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-22 08:04:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:35,723 INFO L225 Difference]: With dead ends: 16923 [2020-12-22 08:04:35,723 INFO L226 Difference]: Without dead ends: 11462 [2020-12-22 08:04:35,733 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 08:04:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11462 states. [2020-12-22 08:04:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11462 to 5785. [2020-12-22 08:04:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5785 states. [2020-12-22 08:04:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 8375 transitions. [2020-12-22 08:04:36,282 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 8375 transitions. Word has length 151 [2020-12-22 08:04:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:36,283 INFO L481 AbstractCegarLoop]: Abstraction has 5785 states and 8375 transitions. [2020-12-22 08:04:36,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 8375 transitions. [2020-12-22 08:04:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:04:36,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:36,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:36,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:04:36,297 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:36,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1043523012, now seen corresponding path program 1 times [2020-12-22 08:04:36,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:36,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561343126] [2020-12-22 08:04:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:36,511 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 08:04:36,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561343126] [2020-12-22 08:04:36,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:36,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:36,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856863956] [2020-12-22 08:04:36,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:36,521 INFO L87 Difference]: Start difference. First operand 5785 states and 8375 transitions. Second operand 5 states. [2020-12-22 08:04:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:37,494 INFO L93 Difference]: Finished difference Result 15762 states and 22719 transitions. [2020-12-22 08:04:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:37,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-12-22 08:04:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:37,519 INFO L225 Difference]: With dead ends: 15762 [2020-12-22 08:04:37,519 INFO L226 Difference]: Without dead ends: 10065 [2020-12-22 08:04:37,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2020-12-22 08:04:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 10063. [2020-12-22 08:04:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10063 states. [2020-12-22 08:04:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 14323 transitions. [2020-12-22 08:04:38,550 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 14323 transitions. Word has length 152 [2020-12-22 08:04:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:38,551 INFO L481 AbstractCegarLoop]: Abstraction has 10063 states and 14323 transitions. [2020-12-22 08:04:38,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 14323 transitions. [2020-12-22 08:04:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:04:38,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:38,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:38,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:04:38,570 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -333116525, now seen corresponding path program 1 times [2020-12-22 08:04:38,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:38,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168949039] [2020-12-22 08:04:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:38,849 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 08:04:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168949039] [2020-12-22 08:04:38,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:38,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:38,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916254564] [2020-12-22 08:04:38,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:38,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:38,855 INFO L87 Difference]: Start difference. First operand 10063 states and 14323 transitions. Second operand 4 states. [2020-12-22 08:04:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:39,504 INFO L93 Difference]: Finished difference Result 18550 states and 26416 transitions. [2020-12-22 08:04:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:39,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 08:04:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:39,532 INFO L225 Difference]: With dead ends: 18550 [2020-12-22 08:04:39,533 INFO L226 Difference]: Without dead ends: 8561 [2020-12-22 08:04:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8561 states. [2020-12-22 08:04:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8561 to 8561. [2020-12-22 08:04:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8561 states. [2020-12-22 08:04:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8561 states to 8561 states and 12196 transitions. [2020-12-22 08:04:40,222 INFO L78 Accepts]: Start accepts. Automaton has 8561 states and 12196 transitions. Word has length 152 [2020-12-22 08:04:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:40,223 INFO L481 AbstractCegarLoop]: Abstraction has 8561 states and 12196 transitions. [2020-12-22 08:04:40,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8561 states and 12196 transitions. [2020-12-22 08:04:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:04:40,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:40,236 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, 1, 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 08:04:40,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:04:40,237 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1970649822, now seen corresponding path program 1 times [2020-12-22 08:04:40,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:40,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239538812] [2020-12-22 08:04:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:40,330 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 08:04:40,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239538812] [2020-12-22 08:04:40,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:40,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:40,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195132365] [2020-12-22 08:04:40,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:40,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:40,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:40,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:40,333 INFO L87 Difference]: Start difference. First operand 8561 states and 12196 transitions. Second operand 3 states. [2020-12-22 08:04:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:41,817 INFO L93 Difference]: Finished difference Result 23111 states and 33322 transitions. [2020-12-22 08:04:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:41,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 08:04:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:41,854 INFO L225 Difference]: With dead ends: 23111 [2020-12-22 08:04:41,855 INFO L226 Difference]: Without dead ends: 15939 [2020-12-22 08:04:41,867 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 08:04:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15939 states. [2020-12-22 08:04:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15939 to 15937. [2020-12-22 08:04:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15937 states. [2020-12-22 08:04:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15937 states to 15937 states and 22716 transitions. [2020-12-22 08:04:43,175 INFO L78 Accepts]: Start accepts. Automaton has 15937 states and 22716 transitions. Word has length 158 [2020-12-22 08:04:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:43,175 INFO L481 AbstractCegarLoop]: Abstraction has 15937 states and 22716 transitions. [2020-12-22 08:04:43,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15937 states and 22716 transitions. [2020-12-22 08:04:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:04:43,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:43,199 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, 1, 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 08:04:43,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:04:43,199 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash 242334909, now seen corresponding path program 1 times [2020-12-22 08:04:43,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:43,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071494054] [2020-12-22 08:04:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:43,379 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 08:04:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071494054] [2020-12-22 08:04:43,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:43,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067570666] [2020-12-22 08:04:43,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:43,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:43,382 INFO L87 Difference]: Start difference. First operand 15937 states and 22716 transitions. Second operand 5 states. [2020-12-22 08:04:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:45,292 INFO L93 Difference]: Finished difference Result 34001 states and 51958 transitions. [2020-12-22 08:04:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:45,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-12-22 08:04:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:45,349 INFO L225 Difference]: With dead ends: 34001 [2020-12-22 08:04:45,349 INFO L226 Difference]: Without dead ends: 27797 [2020-12-22 08:04:45,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:04:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27797 states. [2020-12-22 08:04:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27797 to 22427. [2020-12-22 08:04:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22427 states. [2020-12-22 08:04:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22427 states to 22427 states and 33168 transitions. [2020-12-22 08:04:47,462 INFO L78 Accepts]: Start accepts. Automaton has 22427 states and 33168 transitions. Word has length 158 [2020-12-22 08:04:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:47,462 INFO L481 AbstractCegarLoop]: Abstraction has 22427 states and 33168 transitions. [2020-12-22 08:04:47,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22427 states and 33168 transitions. [2020-12-22 08:04:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:04:47,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:47,497 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, 1, 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 08:04:47,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:04:47,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 76678749, now seen corresponding path program 1 times [2020-12-22 08:04:47,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:47,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464534129] [2020-12-22 08:04:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:47,633 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 08:04:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464534129] [2020-12-22 08:04:47,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:47,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188352321] [2020-12-22 08:04:47,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:47,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:47,637 INFO L87 Difference]: Start difference. First operand 22427 states and 33168 transitions. Second operand 3 states. [2020-12-22 08:04:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:50,121 INFO L93 Difference]: Finished difference Result 52446 states and 79337 transitions. [2020-12-22 08:04:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:50,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 08:04:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:50,183 INFO L225 Difference]: With dead ends: 52446 [2020-12-22 08:04:50,183 INFO L226 Difference]: Without dead ends: 38996 [2020-12-22 08:04:50,210 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 08:04:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38996 states. [2020-12-22 08:04:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38996 to 38994. [2020-12-22 08:04:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38994 states. [2020-12-22 08:04:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38994 states to 38994 states and 57489 transitions. [2020-12-22 08:04:53,394 INFO L78 Accepts]: Start accepts. Automaton has 38994 states and 57489 transitions. Word has length 158 [2020-12-22 08:04:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:53,395 INFO L481 AbstractCegarLoop]: Abstraction has 38994 states and 57489 transitions. [2020-12-22 08:04:53,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 38994 states and 57489 transitions. [2020-12-22 08:04:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:04:53,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:53,429 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, 1, 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 08:04:53,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:04:53,429 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 871068425, now seen corresponding path program 1 times [2020-12-22 08:04:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:53,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699322527] [2020-12-22 08:04:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:53,739 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 08:04:53,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699322527] [2020-12-22 08:04:53,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:53,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:04:53,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349892672] [2020-12-22 08:04:53,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:04:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:04:53,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:04:53,742 INFO L87 Difference]: Start difference. First operand 38994 states and 57489 transitions. Second operand 8 states. [2020-12-22 08:04:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:56,376 INFO L93 Difference]: Finished difference Result 53202 states and 80177 transitions. [2020-12-22 08:04:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:56,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 158 [2020-12-22 08:04:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:56,438 INFO L225 Difference]: With dead ends: 53202 [2020-12-22 08:04:56,438 INFO L226 Difference]: Without dead ends: 38996 [2020-12-22 08:04:56,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:04:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38996 states. [2020-12-22 08:04:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38996 to 38994. [2020-12-22 08:04:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38994 states. [2020-12-22 08:04:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38994 states to 38994 states and 57195 transitions. [2020-12-22 08:04:59,366 INFO L78 Accepts]: Start accepts. Automaton has 38994 states and 57195 transitions. Word has length 158 [2020-12-22 08:04:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:59,366 INFO L481 AbstractCegarLoop]: Abstraction has 38994 states and 57195 transitions. [2020-12-22 08:04:59,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:04:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 38994 states and 57195 transitions. [2020-12-22 08:04:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:04:59,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:59,391 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, 1, 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 08:04:59,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:04:59,392 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash 331313387, now seen corresponding path program 1 times [2020-12-22 08:04:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:59,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708915420] [2020-12-22 08:04:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:59,557 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 08:04:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708915420] [2020-12-22 08:04:59,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:59,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038633958] [2020-12-22 08:04:59,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:59,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:59,560 INFO L87 Difference]: Start difference. First operand 38994 states and 57195 transitions. Second operand 4 states. [2020-12-22 08:05:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:04,393 INFO L93 Difference]: Finished difference Result 102444 states and 150132 transitions. [2020-12-22 08:05:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:04,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-12-22 08:05:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:04,613 INFO L225 Difference]: With dead ends: 102444 [2020-12-22 08:05:04,613 INFO L226 Difference]: Without dead ends: 63584 [2020-12-22 08:05:04,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:05:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63584 states. [2020-12-22 08:05:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63584 to 63582. [2020-12-22 08:05:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63582 states. [2020-12-22 08:05:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 92097 transitions. [2020-12-22 08:05:09,403 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 92097 transitions. Word has length 158 [2020-12-22 08:05:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:09,403 INFO L481 AbstractCegarLoop]: Abstraction has 63582 states and 92097 transitions. [2020-12-22 08:05:09,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 92097 transitions. [2020-12-22 08:05:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 08:05:09,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:09,622 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, 1, 1, 1, 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 08:05:09,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:05:09,623 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1081823353, now seen corresponding path program 1 times [2020-12-22 08:05:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543755361] [2020-12-22 08:05:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:09,840 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 08:05:09,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543755361] [2020-12-22 08:05:09,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:09,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:09,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044001680] [2020-12-22 08:05:09,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:09,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:09,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:09,842 INFO L87 Difference]: Start difference. First operand 63582 states and 92097 transitions. Second operand 4 states. [2020-12-22 08:05:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:13,980 INFO L93 Difference]: Finished difference Result 114208 states and 165449 transitions. [2020-12-22 08:05:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:13,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 08:05:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:14,071 INFO L225 Difference]: With dead ends: 114208 [2020-12-22 08:05:14,072 INFO L226 Difference]: Without dead ends: 63582 [2020-12-22 08:05:14,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:05:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63582 states. [2020-12-22 08:05:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63582 to 63582. [2020-12-22 08:05:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63582 states. [2020-12-22 08:05:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 92096 transitions. [2020-12-22 08:05:19,210 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 92096 transitions. Word has length 160 [2020-12-22 08:05:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:19,211 INFO L481 AbstractCegarLoop]: Abstraction has 63582 states and 92096 transitions. [2020-12-22 08:05:19,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 92096 transitions. [2020-12-22 08:05:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 08:05:19,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:19,252 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, 1, 1, 1, 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 08:05:19,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:05:19,252 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -164919766, now seen corresponding path program 1 times [2020-12-22 08:05:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:19,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829185015] [2020-12-22 08:05:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:19,514 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 08:05:19,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829185015] [2020-12-22 08:05:19,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:19,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:19,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796951083] [2020-12-22 08:05:19,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:19,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:19,516 INFO L87 Difference]: Start difference. First operand 63582 states and 92096 transitions. Second operand 3 states. [2020-12-22 08:05:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:26,519 INFO L93 Difference]: Finished difference Result 161210 states and 233306 transitions. [2020-12-22 08:05:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:26,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 08:05:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:26,746 INFO L225 Difference]: With dead ends: 161210 [2020-12-22 08:05:26,746 INFO L226 Difference]: Without dead ends: 99553 [2020-12-22 08:05:26,812 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 08:05:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99553 states. [2020-12-22 08:05:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99553 to 99551. [2020-12-22 08:05:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99551 states. [2020-12-22 08:05:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99551 states to 99551 states and 141869 transitions. [2020-12-22 08:05:34,365 INFO L78 Accepts]: Start accepts. Automaton has 99551 states and 141869 transitions. Word has length 160 [2020-12-22 08:05:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:34,365 INFO L481 AbstractCegarLoop]: Abstraction has 99551 states and 141869 transitions. [2020-12-22 08:05:34,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 99551 states and 141869 transitions. [2020-12-22 08:05:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:05:34,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:34,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:34,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:05:34,428 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash 29243323, now seen corresponding path program 1 times [2020-12-22 08:05:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:34,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683770342] [2020-12-22 08:05:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:34,872 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 08:05:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683770342] [2020-12-22 08:05:34,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:34,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531633645] [2020-12-22 08:05:34,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:34,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:34,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:34,875 INFO L87 Difference]: Start difference. First operand 99551 states and 141869 transitions. Second operand 3 states. [2020-12-22 08:05:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:44,108 INFO L93 Difference]: Finished difference Result 182467 states and 269363 transitions. [2020-12-22 08:05:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:44,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 08:05:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:44,476 INFO L225 Difference]: With dead ends: 182467 [2020-12-22 08:05:44,476 INFO L226 Difference]: Without dead ends: 126961 [2020-12-22 08:05:44,525 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 08:05:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126961 states. [2020-12-22 08:05:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126961 to 118255. [2020-12-22 08:05:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118255 states. [2020-12-22 08:05:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118255 states to 118255 states and 168625 transitions. [2020-12-22 08:05:54,401 INFO L78 Accepts]: Start accepts. Automaton has 118255 states and 168625 transitions. Word has length 166 [2020-12-22 08:05:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:54,402 INFO L481 AbstractCegarLoop]: Abstraction has 118255 states and 168625 transitions. [2020-12-22 08:05:54,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 118255 states and 168625 transitions. [2020-12-22 08:05:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:05:54,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:54,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:54,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:05:54,443 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:54,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1341734995, now seen corresponding path program 1 times [2020-12-22 08:05:54,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:54,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317763365] [2020-12-22 08:05:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:54,837 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 08:05:54,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317763365] [2020-12-22 08:05:54,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:54,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:54,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404123251] [2020-12-22 08:05:54,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:54,842 INFO L87 Difference]: Start difference. First operand 118255 states and 168625 transitions. Second operand 4 states. [2020-12-22 08:06:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:03,916 INFO L93 Difference]: Finished difference Result 195155 states and 286363 transitions. [2020-12-22 08:06:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:03,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 08:06:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:04,131 INFO L225 Difference]: With dead ends: 195155 [2020-12-22 08:06:04,132 INFO L226 Difference]: Without dead ends: 118257 [2020-12-22 08:06:04,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 08:06:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118257 states. [2020-12-22 08:06:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118257 to 110335. [2020-12-22 08:06:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110335 states. [2020-12-22 08:06:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110335 states to 110335 states and 155573 transitions. [2020-12-22 08:06:13,634 INFO L78 Accepts]: Start accepts. Automaton has 110335 states and 155573 transitions. Word has length 166 [2020-12-22 08:06:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:13,635 INFO L481 AbstractCegarLoop]: Abstraction has 110335 states and 155573 transitions. [2020-12-22 08:06:13,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 110335 states and 155573 transitions. [2020-12-22 08:06:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:06:13,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:13,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:13,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:06:13,671 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1507391155, now seen corresponding path program 1 times [2020-12-22 08:06:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:13,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538578205] [2020-12-22 08:06:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:14,084 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 08:06:14,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538578205] [2020-12-22 08:06:14,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:14,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:14,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9213684] [2020-12-22 08:06:14,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:14,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:14,087 INFO L87 Difference]: Start difference. First operand 110335 states and 155573 transitions. Second operand 5 states. [2020-12-22 08:06:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:29,639 INFO L93 Difference]: Finished difference Result 216009 states and 316757 transitions. [2020-12-22 08:06:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:29,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 08:06:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:29,980 INFO L225 Difference]: With dead ends: 216009 [2020-12-22 08:06:29,980 INFO L226 Difference]: Without dead ends: 186839 [2020-12-22 08:06:30,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186839 states.