/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_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:17:01,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:17:01,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:17:01,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:17:01,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:17:01,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:17:01,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:17:01,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:17:01,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:17:01,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:17:01,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:17:01,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:17:01,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:17:01,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:17:01,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:17:01,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:17:01,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:17:01,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:17:01,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:17:01,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:17:01,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:17:01,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:17:01,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:17:01,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:17:01,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:17:01,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:17:01,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:17:01,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:17:01,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:17:01,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:17:01,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:17:01,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:17:01,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:17:01,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:17:01,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:17:01,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:17:01,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:17:01,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:17:01,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:17:01,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:17:01,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:17:01,308 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:17:01,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:17:01,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:17:01,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:17:01,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:17:01,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:17:01,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:17:01,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:17:01,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:17:01,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:17:01,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:17:01,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:17:01,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:17:01,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:17:01,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:17:01,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:17:01,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:17:01,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:17:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:17:01,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:17:01,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:17:01,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:17:01,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:17:01,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:17:01,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:17:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:17:01,770 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:17:01,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:17:01,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb65e3590/217dbf582b8c4f9e856cac2b62b6cabc/FLAG1206b114e [2020-12-22 08:17:02,659 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:17:02,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:17:02,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb65e3590/217dbf582b8c4f9e856cac2b62b6cabc/FLAG1206b114e [2020-12-22 08:17:02,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb65e3590/217dbf582b8c4f9e856cac2b62b6cabc [2020-12-22 08:17:02,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:17:02,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:17:02,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:02,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:17:02,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:17:02,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:02" (1/1) ... [2020-12-22 08:17:02,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571766d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:02, skipping insertion in model container [2020-12-22 08:17:02,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:02" (1/1) ... [2020-12-22 08:17:02,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:17:02,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:17:03,229 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_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7067,7080] [2020-12-22 08:17:03,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:03,324 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:17:03,390 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_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7067,7080] [2020-12-22 08:17:03,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:03,447 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:17:03,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03 WrapperNode [2020-12-22 08:17:03,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:03,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:03,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:17:03,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:17:03,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:03,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:17:03,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:17:03,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:17:03,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (1/1) ... [2020-12-22 08:17:03,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:17:03,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:17:03,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:17:03,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:17:03,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (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 08:17:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:17:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:17:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:17:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:17:04,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:17:04,884 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:17:04,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:04 BoogieIcfgContainer [2020-12-22 08:17:04,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:17:04,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:17:04,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:17:04,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:17:04,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:17:02" (1/3) ... [2020-12-22 08:17:04,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b5fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:04, skipping insertion in model container [2020-12-22 08:17:04,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:03" (2/3) ... [2020-12-22 08:17:04,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b5fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:04, skipping insertion in model container [2020-12-22 08:17:04,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:04" (3/3) ... [2020-12-22 08:17:04,897 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:17:04,905 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:17:04,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:17:04,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:17:04,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:17:04,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:17:04,963 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:17:04,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:17:04,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:17:04,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:17:04,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:17:04,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:17:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 08:17:04,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:17:04,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:04,997 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] [2020-12-22 08:17:04,997 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1935961454, now seen corresponding path program 1 times [2020-12-22 08:17:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:05,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21482999] [2020-12-22 08:17:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:05,397 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 08:17:05,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21482999] [2020-12-22 08:17:05,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:05,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552250515] [2020-12-22 08:17:05,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:05,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:05,434 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 3 states. [2020-12-22 08:17:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:05,585 INFO L93 Difference]: Finished difference Result 286 states and 465 transitions. [2020-12-22 08:17:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:05,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:17:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:05,605 INFO L225 Difference]: With dead ends: 286 [2020-12-22 08:17:05,605 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 08:17:05,609 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 08:17:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 08:17:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2020-12-22 08:17:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-22 08:17:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2020-12-22 08:17:05,678 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 49 [2020-12-22 08:17:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:05,679 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2020-12-22 08:17:05,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2020-12-22 08:17:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:17:05,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:05,682 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] [2020-12-22 08:17:05,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:17:05,683 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1118200662, now seen corresponding path program 1 times [2020-12-22 08:17:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:05,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838395981] [2020-12-22 08:17:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:05,853 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 08:17:05,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838395981] [2020-12-22 08:17:05,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:05,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311780176] [2020-12-22 08:17:05,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:05,857 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand 3 states. [2020-12-22 08:17:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:05,980 INFO L93 Difference]: Finished difference Result 522 states and 789 transitions. [2020-12-22 08:17:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:05,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:17:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:05,989 INFO L225 Difference]: With dead ends: 522 [2020-12-22 08:17:05,989 INFO L226 Difference]: Without dead ends: 370 [2020-12-22 08:17:05,997 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 08:17:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-22 08:17:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2020-12-22 08:17:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-12-22 08:17:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 545 transitions. [2020-12-22 08:17:06,047 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 545 transitions. Word has length 52 [2020-12-22 08:17:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:06,047 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 545 transitions. [2020-12-22 08:17:06,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 545 transitions. [2020-12-22 08:17:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:17:06,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:06,051 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] [2020-12-22 08:17:06,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:17:06,051 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1570903849, now seen corresponding path program 1 times [2020-12-22 08:17:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:06,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629626136] [2020-12-22 08:17:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:06,156 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 08:17:06,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629626136] [2020-12-22 08:17:06,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:06,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:06,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903540088] [2020-12-22 08:17:06,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:06,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:06,167 INFO L87 Difference]: Start difference. First operand 368 states and 545 transitions. Second operand 3 states. [2020-12-22 08:17:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:06,272 INFO L93 Difference]: Finished difference Result 884 states and 1325 transitions. [2020-12-22 08:17:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:06,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:17:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:06,278 INFO L225 Difference]: With dead ends: 884 [2020-12-22 08:17:06,279 INFO L226 Difference]: Without dead ends: 628 [2020-12-22 08:17:06,285 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 08:17:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-12-22 08:17:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2020-12-22 08:17:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2020-12-22 08:17:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 919 transitions. [2020-12-22 08:17:06,354 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 919 transitions. Word has length 52 [2020-12-22 08:17:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:06,355 INFO L481 AbstractCegarLoop]: Abstraction has 626 states and 919 transitions. [2020-12-22 08:17:06,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 919 transitions. [2020-12-22 08:17:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:17:06,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:06,359 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] [2020-12-22 08:17:06,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:17:06,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1320706551, now seen corresponding path program 1 times [2020-12-22 08:17:06,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:06,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024388376] [2020-12-22 08:17:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:06,438 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 08:17:06,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024388376] [2020-12-22 08:17:06,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:06,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557109316] [2020-12-22 08:17:06,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:06,445 INFO L87 Difference]: Start difference. First operand 626 states and 919 transitions. Second operand 3 states. [2020-12-22 08:17:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:06,548 INFO L93 Difference]: Finished difference Result 1644 states and 2427 transitions. [2020-12-22 08:17:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:06,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:17:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:06,555 INFO L225 Difference]: With dead ends: 1644 [2020-12-22 08:17:06,556 INFO L226 Difference]: Without dead ends: 1106 [2020-12-22 08:17:06,557 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 08:17:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-12-22 08:17:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1104. [2020-12-22 08:17:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2020-12-22 08:17:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2020-12-22 08:17:06,622 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 52 [2020-12-22 08:17:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:06,623 INFO L481 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2020-12-22 08:17:06,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2020-12-22 08:17:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:17:06,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:06,628 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] [2020-12-22 08:17:06,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:17:06,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1834372633, now seen corresponding path program 1 times [2020-12-22 08:17:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:06,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320014237] [2020-12-22 08:17:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:06,763 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 08:17:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320014237] [2020-12-22 08:17:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942778061] [2020-12-22 08:17:06,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:06,765 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand 5 states. [2020-12-22 08:17:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:07,005 INFO L93 Difference]: Finished difference Result 3406 states and 4991 transitions. [2020-12-22 08:17:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:07,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:17:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:07,020 INFO L225 Difference]: With dead ends: 3406 [2020-12-22 08:17:07,020 INFO L226 Difference]: Without dead ends: 2732 [2020-12-22 08:17:07,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 08:17:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2020-12-22 08:17:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1311. [2020-12-22 08:17:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2020-12-22 08:17:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1898 transitions. [2020-12-22 08:17:07,128 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1898 transitions. Word has length 53 [2020-12-22 08:17:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:07,129 INFO L481 AbstractCegarLoop]: Abstraction has 1311 states and 1898 transitions. [2020-12-22 08:17:07,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1898 transitions. [2020-12-22 08:17:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:17:07,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:07,131 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] [2020-12-22 08:17:07,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:17:07,131 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1785989049, now seen corresponding path program 1 times [2020-12-22 08:17:07,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:07,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146517000] [2020-12-22 08:17:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:07,270 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 08:17:07,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146517000] [2020-12-22 08:17:07,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:07,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737884448] [2020-12-22 08:17:07,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:07,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:07,275 INFO L87 Difference]: Start difference. First operand 1311 states and 1898 transitions. Second operand 6 states. [2020-12-22 08:17:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:07,764 INFO L93 Difference]: Finished difference Result 3926 states and 5704 transitions. [2020-12-22 08:17:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:07,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:17:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:07,782 INFO L225 Difference]: With dead ends: 3926 [2020-12-22 08:17:07,782 INFO L226 Difference]: Without dead ends: 2693 [2020-12-22 08:17:07,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:17:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2020-12-22 08:17:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2669. [2020-12-22 08:17:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2669 states. [2020-12-22 08:17:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 3860 transitions. [2020-12-22 08:17:08,010 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 3860 transitions. Word has length 53 [2020-12-22 08:17:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:08,011 INFO L481 AbstractCegarLoop]: Abstraction has 2669 states and 3860 transitions. [2020-12-22 08:17:08,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:17:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 3860 transitions. [2020-12-22 08:17:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:17:08,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:08,014 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] [2020-12-22 08:17:08,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:17:08,015 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1176645599, now seen corresponding path program 1 times [2020-12-22 08:17:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287514058] [2020-12-22 08:17:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:08,160 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 08:17:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287514058] [2020-12-22 08:17:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:08,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:17:08,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852414768] [2020-12-22 08:17:08,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:08,168 INFO L87 Difference]: Start difference. First operand 2669 states and 3860 transitions. Second operand 5 states. [2020-12-22 08:17:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:08,751 INFO L93 Difference]: Finished difference Result 6346 states and 9163 transitions. [2020-12-22 08:17:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:08,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:17:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:08,771 INFO L225 Difference]: With dead ends: 6346 [2020-12-22 08:17:08,772 INFO L226 Difference]: Without dead ends: 3764 [2020-12-22 08:17:08,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2020-12-22 08:17:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 2669. [2020-12-22 08:17:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2669 states. [2020-12-22 08:17:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 3822 transitions. [2020-12-22 08:17:09,015 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 3822 transitions. Word has length 54 [2020-12-22 08:17:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:09,017 INFO L481 AbstractCegarLoop]: Abstraction has 2669 states and 3822 transitions. [2020-12-22 08:17:09,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 3822 transitions. [2020-12-22 08:17:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:17:09,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:09,020 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] [2020-12-22 08:17:09,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:17:09,021 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:09,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2121579715, now seen corresponding path program 1 times [2020-12-22 08:17:09,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:09,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309984612] [2020-12-22 08:17:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:09,172 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 08:17:09,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309984612] [2020-12-22 08:17:09,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:09,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842398209] [2020-12-22 08:17:09,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:09,176 INFO L87 Difference]: Start difference. First operand 2669 states and 3822 transitions. Second operand 5 states. [2020-12-22 08:17:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:09,699 INFO L93 Difference]: Finished difference Result 7945 states and 11474 transitions. [2020-12-22 08:17:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:09,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:17:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:09,732 INFO L225 Difference]: With dead ends: 7945 [2020-12-22 08:17:09,732 INFO L226 Difference]: Without dead ends: 6331 [2020-12-22 08:17:09,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 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 08:17:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6331 states. [2020-12-22 08:17:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6331 to 3325. [2020-12-22 08:17:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3325 states. [2020-12-22 08:17:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 4784 transitions. [2020-12-22 08:17:10,080 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 4784 transitions. Word has length 54 [2020-12-22 08:17:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:10,080 INFO L481 AbstractCegarLoop]: Abstraction has 3325 states and 4784 transitions. [2020-12-22 08:17:10,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 4784 transitions. [2020-12-22 08:17:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:17:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:10,083 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] [2020-12-22 08:17:10,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:17:10,083 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1977718599, now seen corresponding path program 1 times [2020-12-22 08:17:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:10,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112459214] [2020-12-22 08:17:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:10,197 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 08:17:10,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112459214] [2020-12-22 08:17:10,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:10,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:10,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899348132] [2020-12-22 08:17:10,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:10,207 INFO L87 Difference]: Start difference. First operand 3325 states and 4784 transitions. Second operand 5 states. [2020-12-22 08:17:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:10,917 INFO L93 Difference]: Finished difference Result 8592 states and 12418 transitions. [2020-12-22 08:17:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:10,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:17:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:10,976 INFO L225 Difference]: With dead ends: 8592 [2020-12-22 08:17:10,976 INFO L226 Difference]: Without dead ends: 6978 [2020-12-22 08:17:10,981 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 08:17:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2020-12-22 08:17:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 4130. [2020-12-22 08:17:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4130 states. [2020-12-22 08:17:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5970 transitions. [2020-12-22 08:17:11,413 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5970 transitions. Word has length 55 [2020-12-22 08:17:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:11,414 INFO L481 AbstractCegarLoop]: Abstraction has 4130 states and 5970 transitions. [2020-12-22 08:17:11,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5970 transitions. [2020-12-22 08:17:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:17:11,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:11,416 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] [2020-12-22 08:17:11,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:17:11,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1089404270, now seen corresponding path program 1 times [2020-12-22 08:17:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854624550] [2020-12-22 08:17:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:11,485 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 08:17:11,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854624550] [2020-12-22 08:17:11,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:11,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513520328] [2020-12-22 08:17:11,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:11,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:11,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:11,488 INFO L87 Difference]: Start difference. First operand 4130 states and 5970 transitions. Second operand 6 states. [2020-12-22 08:17:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:12,466 INFO L93 Difference]: Finished difference Result 13020 states and 18814 transitions. [2020-12-22 08:17:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:12,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-12-22 08:17:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:12,487 INFO L225 Difference]: With dead ends: 13020 [2020-12-22 08:17:12,488 INFO L226 Difference]: Without dead ends: 8932 [2020-12-22 08:17:12,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:17:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2020-12-22 08:17:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8866. [2020-12-22 08:17:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8866 states. [2020-12-22 08:17:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 12750 transitions. [2020-12-22 08:17:13,360 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 12750 transitions. Word has length 58 [2020-12-22 08:17:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 8866 states and 12750 transitions. [2020-12-22 08:17:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:17:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 12750 transitions. [2020-12-22 08:17:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:17:13,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:13,364 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] [2020-12-22 08:17:13,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:17:13,365 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1572096567, now seen corresponding path program 1 times [2020-12-22 08:17:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:13,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007031854] [2020-12-22 08:17:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:13,443 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 08:17:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007031854] [2020-12-22 08:17:13,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:13,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797978369] [2020-12-22 08:17:13,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:13,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:13,445 INFO L87 Difference]: Start difference. First operand 8866 states and 12750 transitions. Second operand 7 states. [2020-12-22 08:17:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:16,750 INFO L93 Difference]: Finished difference Result 41460 states and 59369 transitions. [2020-12-22 08:17:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:17:16,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:17:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:16,846 INFO L225 Difference]: With dead ends: 41460 [2020-12-22 08:17:16,847 INFO L226 Difference]: Without dead ends: 38612 [2020-12-22 08:17:16,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38612 states. [2020-12-22 08:17:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38612 to 8878. [2020-12-22 08:17:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8878 states. [2020-12-22 08:17:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 12766 transitions. [2020-12-22 08:17:18,023 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 12766 transitions. Word has length 59 [2020-12-22 08:17:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:18,023 INFO L481 AbstractCegarLoop]: Abstraction has 8878 states and 12766 transitions. [2020-12-22 08:17:18,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:17:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 12766 transitions. [2020-12-22 08:17:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:17:18,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:18,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:18,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:17:18,028 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1131093665, now seen corresponding path program 1 times [2020-12-22 08:17:18,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:18,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530766591] [2020-12-22 08:17:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:18,109 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 08:17:18,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530766591] [2020-12-22 08:17:18,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:18,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:18,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361972685] [2020-12-22 08:17:18,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:18,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:18,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:18,112 INFO L87 Difference]: Start difference. First operand 8878 states and 12766 transitions. Second operand 7 states. [2020-12-22 08:17:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:21,351 INFO L93 Difference]: Finished difference Result 33372 states and 47566 transitions. [2020-12-22 08:17:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:17:21,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:17:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:21,421 INFO L225 Difference]: With dead ends: 33372 [2020-12-22 08:17:21,421 INFO L226 Difference]: Without dead ends: 29383 [2020-12-22 08:17:21,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29383 states. [2020-12-22 08:17:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29383 to 8898. [2020-12-22 08:17:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8898 states. [2020-12-22 08:17:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8898 states to 8898 states and 12790 transitions. [2020-12-22 08:17:22,355 INFO L78 Accepts]: Start accepts. Automaton has 8898 states and 12790 transitions. Word has length 60 [2020-12-22 08:17:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:22,355 INFO L481 AbstractCegarLoop]: Abstraction has 8898 states and 12790 transitions. [2020-12-22 08:17:22,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:17:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8898 states and 12790 transitions. [2020-12-22 08:17:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:17:22,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:22,359 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] [2020-12-22 08:17:22,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:17:22,359 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1840434496, now seen corresponding path program 1 times [2020-12-22 08:17:22,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:22,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352975476] [2020-12-22 08:17:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:22,436 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 08:17:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352975476] [2020-12-22 08:17:22,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:22,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:22,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45066879] [2020-12-22 08:17:22,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:22,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:22,439 INFO L87 Difference]: Start difference. First operand 8898 states and 12790 transitions. Second operand 7 states. [2020-12-22 08:17:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:26,790 INFO L93 Difference]: Finished difference Result 39144 states and 55928 transitions. [2020-12-22 08:17:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:17:26,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:17:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:26,873 INFO L225 Difference]: With dead ends: 39144 [2020-12-22 08:17:26,874 INFO L226 Difference]: Without dead ends: 35323 [2020-12-22 08:17:26,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35323 states. [2020-12-22 08:17:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35323 to 8976. [2020-12-22 08:17:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8976 states. [2020-12-22 08:17:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 12890 transitions. [2020-12-22 08:17:28,266 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 12890 transitions. Word has length 60 [2020-12-22 08:17:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:28,267 INFO L481 AbstractCegarLoop]: Abstraction has 8976 states and 12890 transitions. [2020-12-22 08:17:28,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:17:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 12890 transitions. [2020-12-22 08:17:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:28,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:28,271 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] [2020-12-22 08:17:28,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:17:28,272 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1556118219, now seen corresponding path program 1 times [2020-12-22 08:17:28,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:28,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330294064] [2020-12-22 08:17:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:28,506 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 08:17:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330294064] [2020-12-22 08:17:28,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:28,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:17:28,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712067540] [2020-12-22 08:17:28,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:17:28,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:17:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:17:28,509 INFO L87 Difference]: Start difference. First operand 8976 states and 12890 transitions. Second operand 10 states. [2020-12-22 08:17:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:33,083 INFO L93 Difference]: Finished difference Result 30946 states and 44261 transitions. [2020-12-22 08:17:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:17:33,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:17:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:33,124 INFO L225 Difference]: With dead ends: 30946 [2020-12-22 08:17:33,124 INFO L226 Difference]: Without dead ends: 22872 [2020-12-22 08:17:33,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:17:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22872 states. [2020-12-22 08:17:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22872 to 8976. [2020-12-22 08:17:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8976 states. [2020-12-22 08:17:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 12884 transitions. [2020-12-22 08:17:34,532 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 12884 transitions. Word has length 62 [2020-12-22 08:17:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:34,532 INFO L481 AbstractCegarLoop]: Abstraction has 8976 states and 12884 transitions. [2020-12-22 08:17:34,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:17:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 12884 transitions. [2020-12-22 08:17:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:34,537 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] [2020-12-22 08:17:34,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:17:34,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -443125389, now seen corresponding path program 1 times [2020-12-22 08:17:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306578592] [2020-12-22 08:17:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:34,775 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 08:17:34,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306578592] [2020-12-22 08:17:34,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:34,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:17:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622861045] [2020-12-22 08:17:34,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:17:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:17:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:17:34,778 INFO L87 Difference]: Start difference. First operand 8976 states and 12884 transitions. Second operand 10 states. [2020-12-22 08:17:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:39,943 INFO L93 Difference]: Finished difference Result 30322 states and 43433 transitions. [2020-12-22 08:17:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:17:39,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:17:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:39,968 INFO L225 Difference]: With dead ends: 30322 [2020-12-22 08:17:39,968 INFO L226 Difference]: Without dead ends: 22508 [2020-12-22 08:17:39,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:17:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22508 states. [2020-12-22 08:17:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22508 to 8851. [2020-12-22 08:17:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8851 states. [2020-12-22 08:17:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8851 states to 8851 states and 12695 transitions. [2020-12-22 08:17:41,292 INFO L78 Accepts]: Start accepts. Automaton has 8851 states and 12695 transitions. Word has length 62 [2020-12-22 08:17:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:41,292 INFO L481 AbstractCegarLoop]: Abstraction has 8851 states and 12695 transitions. [2020-12-22 08:17:41,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:17:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8851 states and 12695 transitions. [2020-12-22 08:17:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:41,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:41,296 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] [2020-12-22 08:17:41,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:17:41,296 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1162737396, now seen corresponding path program 1 times [2020-12-22 08:17:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:41,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095209754] [2020-12-22 08:17:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:41,504 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 08:17:41,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095209754] [2020-12-22 08:17:41,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:41,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:17:41,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410504204] [2020-12-22 08:17:41,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:17:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:17:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:17:41,506 INFO L87 Difference]: Start difference. First operand 8851 states and 12695 transitions. Second operand 10 states. [2020-12-22 08:17:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:46,612 INFO L93 Difference]: Finished difference Result 31534 states and 45157 transitions. [2020-12-22 08:17:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:17:46,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:17:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:46,643 INFO L225 Difference]: With dead ends: 31534 [2020-12-22 08:17:46,644 INFO L226 Difference]: Without dead ends: 23616 [2020-12-22 08:17:46,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:17:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23616 states. [2020-12-22 08:17:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23616 to 8680. [2020-12-22 08:17:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8680 states. [2020-12-22 08:17:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 12443 transitions. [2020-12-22 08:17:48,215 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 12443 transitions. Word has length 62 [2020-12-22 08:17:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:48,216 INFO L481 AbstractCegarLoop]: Abstraction has 8680 states and 12443 transitions. [2020-12-22 08:17:48,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:17:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 12443 transitions. [2020-12-22 08:17:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:48,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:48,219 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] [2020-12-22 08:17:48,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:17:48,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1143949417, now seen corresponding path program 1 times [2020-12-22 08:17:48,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:48,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291891460] [2020-12-22 08:17:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:48,263 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 08:17:48,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291891460] [2020-12-22 08:17:48,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:48,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:48,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921987812] [2020-12-22 08:17:48,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:48,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:48,265 INFO L87 Difference]: Start difference. First operand 8680 states and 12443 transitions. Second operand 3 states. [2020-12-22 08:17:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:49,507 INFO L93 Difference]: Finished difference Result 12476 states and 17864 transitions. [2020-12-22 08:17:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:49,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:17:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:49,518 INFO L225 Difference]: With dead ends: 12476 [2020-12-22 08:17:49,518 INFO L226 Difference]: Without dead ends: 8667 [2020-12-22 08:17:49,524 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 08:17:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2020-12-22 08:17:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8665. [2020-12-22 08:17:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8665 states. [2020-12-22 08:17:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8665 states to 8665 states and 12236 transitions. [2020-12-22 08:17:50,845 INFO L78 Accepts]: Start accepts. Automaton has 8665 states and 12236 transitions. Word has length 63 [2020-12-22 08:17:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:50,846 INFO L481 AbstractCegarLoop]: Abstraction has 8665 states and 12236 transitions. [2020-12-22 08:17:50,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8665 states and 12236 transitions. [2020-12-22 08:17:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:50,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:50,849 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] [2020-12-22 08:17:50,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:17:50,849 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1363691260, now seen corresponding path program 1 times [2020-12-22 08:17:50,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:50,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672600807] [2020-12-22 08:17:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:50,895 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 08:17:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672600807] [2020-12-22 08:17:50,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:50,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:50,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201801867] [2020-12-22 08:17:50,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:50,897 INFO L87 Difference]: Start difference. First operand 8665 states and 12236 transitions. Second operand 3 states. [2020-12-22 08:17:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:52,496 INFO L93 Difference]: Finished difference Result 11463 states and 16151 transitions. [2020-12-22 08:17:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:52,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:17:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:52,505 INFO L225 Difference]: With dead ends: 11463 [2020-12-22 08:17:52,505 INFO L226 Difference]: Without dead ends: 7668 [2020-12-22 08:17:52,511 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 08:17:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2020-12-22 08:17:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 7666. [2020-12-22 08:17:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7666 states. [2020-12-22 08:17:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 10631 transitions. [2020-12-22 08:17:53,694 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 10631 transitions. Word has length 63 [2020-12-22 08:17:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:53,694 INFO L481 AbstractCegarLoop]: Abstraction has 7666 states and 10631 transitions. [2020-12-22 08:17:53,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 10631 transitions. [2020-12-22 08:17:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:53,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:53,697 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] [2020-12-22 08:17:53,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:17:53,697 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1254313906, now seen corresponding path program 1 times [2020-12-22 08:17:53,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:53,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139031345] [2020-12-22 08:17:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:53,744 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 08:17:53,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139031345] [2020-12-22 08:17:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096336381] [2020-12-22 08:17:53,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:53,747 INFO L87 Difference]: Start difference. First operand 7666 states and 10631 transitions. Second operand 3 states. [2020-12-22 08:17:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:55,243 INFO L93 Difference]: Finished difference Result 9342 states and 12899 transitions. [2020-12-22 08:17:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:55,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:17:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:55,250 INFO L225 Difference]: With dead ends: 9342 [2020-12-22 08:17:55,251 INFO L226 Difference]: Without dead ends: 6658 [2020-12-22 08:17:55,255 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 08:17:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6658 states. [2020-12-22 08:17:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6658 to 6656. [2020-12-22 08:17:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6656 states. [2020-12-22 08:17:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 9031 transitions. [2020-12-22 08:17:56,219 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 9031 transitions. Word has length 63 [2020-12-22 08:17:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:56,219 INFO L481 AbstractCegarLoop]: Abstraction has 6656 states and 9031 transitions. [2020-12-22 08:17:56,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 9031 transitions. [2020-12-22 08:17:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:17:56,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:56,222 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] [2020-12-22 08:17:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:17:56,222 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -424034558, now seen corresponding path program 1 times [2020-12-22 08:17:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:56,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264886520] [2020-12-22 08:17:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:57,090 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 08:17:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264886520] [2020-12-22 08:17:57,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:57,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:17:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410849225] [2020-12-22 08:17:57,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:17:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:17:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:17:57,093 INFO L87 Difference]: Start difference. First operand 6656 states and 9031 transitions. Second operand 23 states. [2020-12-22 08:17:57,357 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 08:17:58,423 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 08:17:58,679 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 08:17:59,148 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-12-22 08:17:59,476 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 08:17:59,648 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:17:59,934 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:18:00,207 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:18:00,466 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:18:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:08,525 INFO L93 Difference]: Finished difference Result 21942 states and 30142 transitions. [2020-12-22 08:18:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:18:08,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:18:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:08,546 INFO L225 Difference]: With dead ends: 21942 [2020-12-22 08:18:08,547 INFO L226 Difference]: Without dead ends: 21560 [2020-12-22 08:18:08,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:18:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21560 states. [2020-12-22 08:18:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21560 to 6638. [2020-12-22 08:18:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6638 states. [2020-12-22 08:18:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 9006 transitions. [2020-12-22 08:18:09,763 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 9006 transitions. Word has length 64 [2020-12-22 08:18:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:09,764 INFO L481 AbstractCegarLoop]: Abstraction has 6638 states and 9006 transitions. [2020-12-22 08:18:09,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 9006 transitions. [2020-12-22 08:18:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:09,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:09,766 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] [2020-12-22 08:18:09,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:18:09,767 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 250019910, now seen corresponding path program 1 times [2020-12-22 08:18:09,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:09,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629770011] [2020-12-22 08:18:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:10,855 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 08:18:10,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629770011] [2020-12-22 08:18:10,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:10,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:10,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288429132] [2020-12-22 08:18:10,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:10,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:10,858 INFO L87 Difference]: Start difference. First operand 6638 states and 9006 transitions. Second operand 23 states. [2020-12-22 08:18:11,227 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-12-22 08:18:12,195 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:18:12,435 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:18:12,926 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-12-22 08:18:13,300 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-22 08:18:13,949 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-12-22 08:18:14,444 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 08:18:14,675 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:18:14,976 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:18:15,317 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:18:15,645 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:18:15,966 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:18:16,413 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:18:16,652 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 08:18:16,873 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-22 08:18:19,170 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:18:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:26,028 INFO L93 Difference]: Finished difference Result 28856 states and 39681 transitions. [2020-12-22 08:18:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:18:26,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:18:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:26,058 INFO L225 Difference]: With dead ends: 28856 [2020-12-22 08:18:26,059 INFO L226 Difference]: Without dead ends: 28474 [2020-12-22 08:18:26,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=476, Invalid=1974, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 08:18:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28474 states. [2020-12-22 08:18:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28474 to 6620. [2020-12-22 08:18:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6620 states. [2020-12-22 08:18:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 8981 transitions. [2020-12-22 08:18:27,453 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 8981 transitions. Word has length 64 [2020-12-22 08:18:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:27,453 INFO L481 AbstractCegarLoop]: Abstraction has 6620 states and 8981 transitions. [2020-12-22 08:18:27,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 8981 transitions. [2020-12-22 08:18:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:27,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:27,455 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] [2020-12-22 08:18:27,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:18:27,455 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1940234754, now seen corresponding path program 1 times [2020-12-22 08:18:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:27,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35980208] [2020-12-22 08:18:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:28,566 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 08:18:28,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35980208] [2020-12-22 08:18:28,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:28,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:28,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155294443] [2020-12-22 08:18:28,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:28,568 INFO L87 Difference]: Start difference. First operand 6620 states and 8981 transitions. Second operand 23 states. [2020-12-22 08:18:28,851 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-12-22 08:18:29,283 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:18:29,450 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 08:18:29,612 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 08:18:29,765 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-12-22 08:18:30,024 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 08:18:30,220 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:18:30,609 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 08:18:30,940 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-12-22 08:18:31,549 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-12-22 08:18:31,983 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-12-22 08:18:32,235 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 08:18:32,574 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 08:18:32,792 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:18:33,186 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 08:18:33,566 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 08:18:33,959 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 08:18:34,142 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:18:34,413 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 08:18:34,665 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-12-22 08:18:35,093 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:18:35,254 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 08:18:38,189 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:18:38,647 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:18:39,803 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:18:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:45,513 INFO L93 Difference]: Finished difference Result 23967 states and 32915 transitions. [2020-12-22 08:18:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:18:45,516 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:18:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:45,541 INFO L225 Difference]: With dead ends: 23967 [2020-12-22 08:18:45,542 INFO L226 Difference]: Without dead ends: 23585 [2020-12-22 08:18:45,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 08:18:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23585 states. [2020-12-22 08:18:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23585 to 6632. [2020-12-22 08:18:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6632 states. [2020-12-22 08:18:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 8996 transitions. [2020-12-22 08:18:47,132 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 8996 transitions. Word has length 64 [2020-12-22 08:18:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:47,132 INFO L481 AbstractCegarLoop]: Abstraction has 6632 states and 8996 transitions. [2020-12-22 08:18:47,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 8996 transitions. [2020-12-22 08:18:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:47,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:47,135 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] [2020-12-22 08:18:47,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:18:47,136 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1380487795, now seen corresponding path program 1 times [2020-12-22 08:18:47,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:47,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924742972] [2020-12-22 08:18:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:47,171 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 08:18:47,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924742972] [2020-12-22 08:18:47,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:47,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821439472] [2020-12-22 08:18:47,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:47,173 INFO L87 Difference]: Start difference. First operand 6632 states and 8996 transitions. Second operand 3 states. [2020-12-22 08:18:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:49,526 INFO L93 Difference]: Finished difference Result 12107 states and 16514 transitions. [2020-12-22 08:18:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:49,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:18:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:49,536 INFO L225 Difference]: With dead ends: 12107 [2020-12-22 08:18:49,536 INFO L226 Difference]: Without dead ends: 9607 [2020-12-22 08:18:49,540 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 08:18:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9607 states. [2020-12-22 08:18:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 6532. [2020-12-22 08:18:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6532 states. [2020-12-22 08:18:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 8850 transitions. [2020-12-22 08:18:51,070 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 8850 transitions. Word has length 64 [2020-12-22 08:18:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:51,070 INFO L481 AbstractCegarLoop]: Abstraction has 6532 states and 8850 transitions. [2020-12-22 08:18:51,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 8850 transitions. [2020-12-22 08:18:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:51,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:51,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:51,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:18:51,072 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1914859187, now seen corresponding path program 1 times [2020-12-22 08:18:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003013643] [2020-12-22 08:18:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:51,122 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 08:18:51,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003013643] [2020-12-22 08:18:51,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:51,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:51,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442238102] [2020-12-22 08:18:51,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:51,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:51,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:51,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:51,128 INFO L87 Difference]: Start difference. First operand 6532 states and 8850 transitions. Second operand 3 states. [2020-12-22 08:18:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:53,524 INFO L93 Difference]: Finished difference Result 11971 states and 16310 transitions. [2020-12-22 08:18:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:53,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:18:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:53,534 INFO L225 Difference]: With dead ends: 11971 [2020-12-22 08:18:53,534 INFO L226 Difference]: Without dead ends: 9437 [2020-12-22 08:18:53,539 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 08:18:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9437 states. [2020-12-22 08:18:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9437 to 6362. [2020-12-22 08:18:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6362 states. [2020-12-22 08:18:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6362 states to 6362 states and 8618 transitions. [2020-12-22 08:18:55,267 INFO L78 Accepts]: Start accepts. Automaton has 6362 states and 8618 transitions. Word has length 64 [2020-12-22 08:18:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:55,267 INFO L481 AbstractCegarLoop]: Abstraction has 6362 states and 8618 transitions. [2020-12-22 08:18:55,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6362 states and 8618 transitions. [2020-12-22 08:18:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:18:55,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:55,269 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] [2020-12-22 08:18:55,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:18:55,269 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1138559632, now seen corresponding path program 1 times [2020-12-22 08:18:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:55,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325438335] [2020-12-22 08:18:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:55,979 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 08:18:55,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325438335] [2020-12-22 08:18:55,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:55,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:18:55,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382641194] [2020-12-22 08:18:55,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:18:55,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:18:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:18:55,981 INFO L87 Difference]: Start difference. First operand 6362 states and 8618 transitions. Second operand 17 states. [2020-12-22 08:18:56,823 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:18:57,029 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:18:57,242 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:18:57,485 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:18:57,712 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:18:57,951 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:18:58,118 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:18:58,398 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:18:58,590 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:18:58,770 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:18:58,982 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 08:18:59,189 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 08:18:59,494 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:18:59,644 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:18:59,893 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:19:00,092 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-22 08:19:00,307 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:19:00,565 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 08:19:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:09,485 INFO L93 Difference]: Finished difference Result 24658 states and 33764 transitions. [2020-12-22 08:19:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 08:19:09,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 08:19:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:09,510 INFO L225 Difference]: With dead ends: 24658 [2020-12-22 08:19:09,510 INFO L226 Difference]: Without dead ends: 23570 [2020-12-22 08:19:09,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:19:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23570 states. [2020-12-22 08:19:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23570 to 6300. [2020-12-22 08:19:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-12-22 08:19:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 8535 transitions. [2020-12-22 08:19:11,536 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 8535 transitions. Word has length 65 [2020-12-22 08:19:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:11,536 INFO L481 AbstractCegarLoop]: Abstraction has 6300 states and 8535 transitions. [2020-12-22 08:19:11,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:19:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 8535 transitions. [2020-12-22 08:19:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:19:11,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:11,538 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] [2020-12-22 08:19:11,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:19:11,538 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1339466768, now seen corresponding path program 1 times [2020-12-22 08:19:11,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:11,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621507031] [2020-12-22 08:19:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:12,637 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 08:19:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621507031] [2020-12-22 08:19:12,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:12,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:19:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701878788] [2020-12-22 08:19:12,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:19:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:19:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:19:12,639 INFO L87 Difference]: Start difference. First operand 6300 states and 8535 transitions. Second operand 18 states. [2020-12-22 08:19:12,812 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-22 08:19:13,101 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 08:19:13,272 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 08:19:13,494 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-22 08:19:13,709 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:19:14,014 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:19:14,267 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-22 08:19:14,897 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-12-22 08:19:15,544 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-12-22 08:19:15,820 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:19:16,248 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:19:16,397 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:19:16,732 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:19:17,152 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 08:19:17,648 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 08:19:17,884 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 08:19:18,403 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 08:19:18,738 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-12-22 08:19:19,009 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-22 08:19:19,326 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-22 08:19:19,588 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:19:19,896 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 08:19:20,245 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-22 08:19:21,783 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:19:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:32,613 INFO L93 Difference]: Finished difference Result 26181 states and 35896 transitions. [2020-12-22 08:19:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:19:32,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 08:19:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:32,641 INFO L225 Difference]: With dead ends: 26181 [2020-12-22 08:19:32,642 INFO L226 Difference]: Without dead ends: 25571 [2020-12-22 08:19:32,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:19:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25571 states. [2020-12-22 08:19:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25571 to 6242. [2020-12-22 08:19:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6242 states. [2020-12-22 08:19:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 8458 transitions. [2020-12-22 08:19:34,856 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 8458 transitions. Word has length 65 [2020-12-22 08:19:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:34,856 INFO L481 AbstractCegarLoop]: Abstraction has 6242 states and 8458 transitions. [2020-12-22 08:19:34,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:19:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 8458 transitions. [2020-12-22 08:19:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:19:34,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:34,859 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] [2020-12-22 08:19:34,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:19:34,859 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:34,860 INFO L82 PathProgramCache]: Analyzing trace with hash -427633856, now seen corresponding path program 1 times [2020-12-22 08:19:34,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:34,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958462626] [2020-12-22 08:19:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:34,935 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 08:19:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958462626] [2020-12-22 08:19:34,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:34,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:34,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50575931] [2020-12-22 08:19:34,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:34,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:34,937 INFO L87 Difference]: Start difference. First operand 6242 states and 8458 transitions. Second operand 5 states. [2020-12-22 08:19:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:36,923 INFO L93 Difference]: Finished difference Result 6248 states and 8461 transitions. [2020-12-22 08:19:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:36,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:19:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:36,931 INFO L225 Difference]: With dead ends: 6248 [2020-12-22 08:19:36,931 INFO L226 Difference]: Without dead ends: 5868 [2020-12-22 08:19:36,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 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 08:19:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2020-12-22 08:19:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5864. [2020-12-22 08:19:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5864 states. [2020-12-22 08:19:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 7962 transitions. [2020-12-22 08:19:38,856 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 7962 transitions. Word has length 68 [2020-12-22 08:19:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:38,856 INFO L481 AbstractCegarLoop]: Abstraction has 5864 states and 7962 transitions. [2020-12-22 08:19:38,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 7962 transitions. [2020-12-22 08:19:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:19:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:38,858 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] [2020-12-22 08:19:38,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:19:38,858 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1513353753, now seen corresponding path program 1 times [2020-12-22 08:19:38,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:38,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143929576] [2020-12-22 08:19:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:38,903 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 08:19:38,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143929576] [2020-12-22 08:19:38,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:38,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:38,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960501568] [2020-12-22 08:19:38,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:38,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:38,905 INFO L87 Difference]: Start difference. First operand 5864 states and 7962 transitions. Second operand 3 states. [2020-12-22 08:19:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:42,517 INFO L93 Difference]: Finished difference Result 15889 states and 21668 transitions. [2020-12-22 08:19:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:42,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 08:19:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:42,528 INFO L225 Difference]: With dead ends: 15889 [2020-12-22 08:19:42,528 INFO L226 Difference]: Without dead ends: 10624 [2020-12-22 08:19:42,534 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 08:19:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10624 states. [2020-12-22 08:19:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10624 to 9942. [2020-12-22 08:19:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9942 states. [2020-12-22 08:19:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9942 states to 9942 states and 13474 transitions. [2020-12-22 08:19:45,857 INFO L78 Accepts]: Start accepts. Automaton has 9942 states and 13474 transitions. Word has length 71 [2020-12-22 08:19:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:45,857 INFO L481 AbstractCegarLoop]: Abstraction has 9942 states and 13474 transitions. [2020-12-22 08:19:45,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9942 states and 13474 transitions. [2020-12-22 08:19:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:19:45,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:45,859 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] [2020-12-22 08:19:45,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:19:45,859 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:45,860 INFO L82 PathProgramCache]: Analyzing trace with hash 87467842, now seen corresponding path program 1 times [2020-12-22 08:19:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73221429] [2020-12-22 08:19:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:45,902 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 08:19:45,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73221429] [2020-12-22 08:19:45,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:45,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571411095] [2020-12-22 08:19:45,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:45,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:45,904 INFO L87 Difference]: Start difference. First operand 9942 states and 13474 transitions. Second operand 3 states. [2020-12-22 08:19:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:52,421 INFO L93 Difference]: Finished difference Result 27618 states and 37414 transitions. [2020-12-22 08:19:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:52,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:19:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:52,444 INFO L225 Difference]: With dead ends: 27618 [2020-12-22 08:19:52,444 INFO L226 Difference]: Without dead ends: 18275 [2020-12-22 08:19:52,455 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 08:19:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18275 states. [2020-12-22 08:19:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18275 to 16913. [2020-12-22 08:19:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16913 states. [2020-12-22 08:19:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16913 states to 16913 states and 22763 transitions. [2020-12-22 08:19:58,325 INFO L78 Accepts]: Start accepts. Automaton has 16913 states and 22763 transitions. Word has length 72 [2020-12-22 08:19:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:58,326 INFO L481 AbstractCegarLoop]: Abstraction has 16913 states and 22763 transitions. [2020-12-22 08:19:58,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 16913 states and 22763 transitions. [2020-12-22 08:19:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:19:58,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:58,328 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] [2020-12-22 08:19:58,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:19:58,328 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1178358807, now seen corresponding path program 1 times [2020-12-22 08:19:58,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:58,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389004596] [2020-12-22 08:19:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:58,372 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 08:19:58,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389004596] [2020-12-22 08:19:58,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:58,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666613715] [2020-12-22 08:19:58,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:58,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:58,374 INFO L87 Difference]: Start difference. First operand 16913 states and 22763 transitions. Second operand 3 states. [2020-12-22 08:20:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:09,622 INFO L93 Difference]: Finished difference Result 47317 states and 63393 transitions. [2020-12-22 08:20:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:09,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:20:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:09,657 INFO L225 Difference]: With dead ends: 47317 [2020-12-22 08:20:09,657 INFO L226 Difference]: Without dead ends: 30879 [2020-12-22 08:20:09,668 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 08:20:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30879 states. [2020-12-22 08:20:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30879 to 28389. [2020-12-22 08:20:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28389 states. [2020-12-22 08:20:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28389 states to 28389 states and 37789 transitions. [2020-12-22 08:20:20,331 INFO L78 Accepts]: Start accepts. Automaton has 28389 states and 37789 transitions. Word has length 74 [2020-12-22 08:20:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:20,331 INFO L481 AbstractCegarLoop]: Abstraction has 28389 states and 37789 transitions. [2020-12-22 08:20:20,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28389 states and 37789 transitions. [2020-12-22 08:20:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:20:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:20,333 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] [2020-12-22 08:20:20,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:20:20,333 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1504202340, now seen corresponding path program 1 times [2020-12-22 08:20:20,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:20,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871305288] [2020-12-22 08:20:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:20,433 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 08:20:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871305288] [2020-12-22 08:20:20,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:20,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:20:20,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893907527] [2020-12-22 08:20:20,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:20:20,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:20:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:20,435 INFO L87 Difference]: Start difference. First operand 28389 states and 37789 transitions. Second operand 6 states. [2020-12-22 08:20:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:43,906 INFO L93 Difference]: Finished difference Result 57869 states and 75871 transitions. [2020-12-22 08:20:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:20:43,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-12-22 08:20:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:43,982 INFO L225 Difference]: With dead ends: 57869 [2020-12-22 08:20:43,982 INFO L226 Difference]: Without dead ends: 57867 [2020-12-22 08:20:43,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:20:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57867 states. [2020-12-22 08:20:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57867 to 30909. [2020-12-22 08:20:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30909 states. [2020-12-22 08:20:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30909 states to 30909 states and 40309 transitions. [2020-12-22 08:20:57,099 INFO L78 Accepts]: Start accepts. Automaton has 30909 states and 40309 transitions. Word has length 75 [2020-12-22 08:20:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:57,099 INFO L481 AbstractCegarLoop]: Abstraction has 30909 states and 40309 transitions. [2020-12-22 08:20:57,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:20:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30909 states and 40309 transitions. [2020-12-22 08:20:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:20:57,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:57,101 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] [2020-12-22 08:20:57,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 08:20:57,101 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1668309570, now seen corresponding path program 1 times [2020-12-22 08:20:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:57,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394423905] [2020-12-22 08:20:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:57,142 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 08:20:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394423905] [2020-12-22 08:20:57,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:57,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195321502] [2020-12-22 08:20:57,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:57,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:57,144 INFO L87 Difference]: Start difference. First operand 30909 states and 40309 transitions. Second operand 3 states.