/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:14:38,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:14:38,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:14:38,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:14:38,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:14:38,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:14:38,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:14:38,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:14:38,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:14:38,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:14:38,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:14:38,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:14:38,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:14:38,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:14:38,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:14:38,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:14:38,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:14:38,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:14:38,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:14:38,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:14:38,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:14:38,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:14:38,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:14:38,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:14:38,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:14:38,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:14:38,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:14:38,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:14:38,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:14:38,791 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:14:38,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:14:38,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:14:38,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:14:38,796 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:14:38,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:14:38,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:14:38,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:14:38,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:14:38,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:14:38,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:14:38,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:14:38,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:14:38,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:14:38,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:14:38,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:14:38,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:14:38,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:14:38,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:14:38,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:14:38,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:14:38,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:14:38,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:14:38,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:14:38,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:14:38,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:14:39,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:14:39,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:14:39,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:14:39,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:14:39,258 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:14:39,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:39,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b17d5198/0479887e30054c52992984c0ddb08715/FLAG0972912ce [2020-12-22 08:14:40,039 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:14:40,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:40,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b17d5198/0479887e30054c52992984c0ddb08715/FLAG0972912ce [2020-12-22 08:14:40,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b17d5198/0479887e30054c52992984c0ddb08715 [2020-12-22 08:14:40,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:14:40,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:14:40,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:14:40,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:14:40,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:14:40,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:14:40" (1/1) ... [2020-12-22 08:14:40,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6292bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:40, skipping insertion in model container [2020-12-22 08:14:40,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:14:40" (1/1) ... [2020-12-22 08:14:40,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:14:40,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:14:40,765 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21680,21693] [2020-12-22 08:14:41,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:14:41,079 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:14:41,319 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21680,21693] [2020-12-22 08:14:41,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:14:41,456 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:14:41,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41 WrapperNode [2020-12-22 08:14:41,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:14:41,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:14:41,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:14:41,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:14:41,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:14:41,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:14:41,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:14:41,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:14:41,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (1/1) ... [2020-12-22 08:14:41,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:14:41,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:14:41,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:14:41,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:14:41,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (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 08:14:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:14:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:14:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:14:41,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:14:43,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:14:43,948 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:14:43,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:14:43 BoogieIcfgContainer [2020-12-22 08:14:43,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:14:43,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:14:43,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:14:43,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:14:43,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:14:40" (1/3) ... [2020-12-22 08:14:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e91d064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:14:43, skipping insertion in model container [2020-12-22 08:14:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:41" (2/3) ... [2020-12-22 08:14:43,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e91d064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:14:43, skipping insertion in model container [2020-12-22 08:14:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:14:43" (3/3) ... [2020-12-22 08:14:43,961 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:43,967 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:14:43,973 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:14:43,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:14:44,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:14:44,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:14:44,023 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:14:44,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:14:44,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:14:44,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:14:44,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:14:44,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:14:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states. [2020-12-22 08:14:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 08:14:44,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:44,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:44,094 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -666845715, now seen corresponding path program 1 times [2020-12-22 08:14:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926939088] [2020-12-22 08:14:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:44,996 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 08:14:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926939088] [2020-12-22 08:14:44,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:44,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362447249] [2020-12-22 08:14:45,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:45,040 INFO L87 Difference]: Start difference. First operand 736 states. Second operand 3 states. [2020-12-22 08:14:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:45,299 INFO L93 Difference]: Finished difference Result 1109 states and 1983 transitions. [2020-12-22 08:14:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:45,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 08:14:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:45,356 INFO L225 Difference]: With dead ends: 1109 [2020-12-22 08:14:45,357 INFO L226 Difference]: Without dead ends: 910 [2020-12-22 08:14:45,362 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 08:14:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-12-22 08:14:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 908. [2020-12-22 08:14:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2020-12-22 08:14:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1580 transitions. [2020-12-22 08:14:45,470 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1580 transitions. Word has length 204 [2020-12-22 08:14:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:45,471 INFO L481 AbstractCegarLoop]: Abstraction has 908 states and 1580 transitions. [2020-12-22 08:14:45,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1580 transitions. [2020-12-22 08:14:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 08:14:45,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:45,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:45,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:14:45,478 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:45,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:45,478 INFO L82 PathProgramCache]: Analyzing trace with hash 961374666, now seen corresponding path program 1 times [2020-12-22 08:14:45,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:45,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320986129] [2020-12-22 08:14:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:45,794 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 08:14:45,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320986129] [2020-12-22 08:14:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710526140] [2020-12-22 08:14:45,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:45,802 INFO L87 Difference]: Start difference. First operand 908 states and 1580 transitions. Second operand 3 states. [2020-12-22 08:14:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:45,881 INFO L93 Difference]: Finished difference Result 1616 states and 2772 transitions. [2020-12-22 08:14:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:45,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 08:14:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:45,893 INFO L225 Difference]: With dead ends: 1616 [2020-12-22 08:14:45,894 INFO L226 Difference]: Without dead ends: 1251 [2020-12-22 08:14:45,900 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 08:14:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-12-22 08:14:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2020-12-22 08:14:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2020-12-22 08:14:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2152 transitions. [2020-12-22 08:14:45,960 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2152 transitions. Word has length 208 [2020-12-22 08:14:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:45,962 INFO L481 AbstractCegarLoop]: Abstraction has 1249 states and 2152 transitions. [2020-12-22 08:14:45,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2152 transitions. [2020-12-22 08:14:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 08:14:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:45,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:45,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:14:45,969 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1204290054, now seen corresponding path program 1 times [2020-12-22 08:14:45,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:45,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685897703] [2020-12-22 08:14:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685897703] [2020-12-22 08:14:46,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692708660] [2020-12-22 08:14:46,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:46,340 INFO L87 Difference]: Start difference. First operand 1249 states and 2152 transitions. Second operand 3 states. [2020-12-22 08:14:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:46,454 INFO L93 Difference]: Finished difference Result 1950 states and 3336 transitions. [2020-12-22 08:14:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:46,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 08:14:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:46,472 INFO L225 Difference]: With dead ends: 1950 [2020-12-22 08:14:46,472 INFO L226 Difference]: Without dead ends: 1585 [2020-12-22 08:14:46,474 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 08:14:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-12-22 08:14:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1583. [2020-12-22 08:14:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2020-12-22 08:14:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2714 transitions. [2020-12-22 08:14:46,573 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2714 transitions. Word has length 212 [2020-12-22 08:14:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:46,582 INFO L481 AbstractCegarLoop]: Abstraction has 1583 states and 2714 transitions. [2020-12-22 08:14:46,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2714 transitions. [2020-12-22 08:14:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 08:14:46,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:46,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:46,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:14:46,588 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash -640806259, now seen corresponding path program 1 times [2020-12-22 08:14:46,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:46,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949411054] [2020-12-22 08:14:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:46,864 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 08:14:46,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949411054] [2020-12-22 08:14:46,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:46,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695369237] [2020-12-22 08:14:46,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:46,869 INFO L87 Difference]: Start difference. First operand 1583 states and 2714 transitions. Second operand 3 states. [2020-12-22 08:14:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:46,980 INFO L93 Difference]: Finished difference Result 3523 states and 5970 transitions. [2020-12-22 08:14:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:46,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 08:14:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:46,995 INFO L225 Difference]: With dead ends: 3523 [2020-12-22 08:14:46,995 INFO L226 Difference]: Without dead ends: 2520 [2020-12-22 08:14:46,998 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 08:14:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2020-12-22 08:14:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2518. [2020-12-22 08:14:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2518 states. [2020-12-22 08:14:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 4272 transitions. [2020-12-22 08:14:47,109 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 4272 transitions. Word has length 212 [2020-12-22 08:14:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:47,109 INFO L481 AbstractCegarLoop]: Abstraction has 2518 states and 4272 transitions. [2020-12-22 08:14:47,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 4272 transitions. [2020-12-22 08:14:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 08:14:47,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:47,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:47,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:14:47,115 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1656526890, now seen corresponding path program 1 times [2020-12-22 08:14:47,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:47,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655933750] [2020-12-22 08:14:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:47,341 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 08:14:47,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655933750] [2020-12-22 08:14:47,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:47,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:47,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503018002] [2020-12-22 08:14:47,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:47,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:47,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:47,343 INFO L87 Difference]: Start difference. First operand 2518 states and 4272 transitions. Second operand 3 states. [2020-12-22 08:14:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:47,524 INFO L93 Difference]: Finished difference Result 6262 states and 10518 transitions. [2020-12-22 08:14:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:47,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 08:14:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:47,551 INFO L225 Difference]: With dead ends: 6262 [2020-12-22 08:14:47,552 INFO L226 Difference]: Without dead ends: 4324 [2020-12-22 08:14:47,559 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 08:14:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2020-12-22 08:14:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4322. [2020-12-22 08:14:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4322 states. [2020-12-22 08:14:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 7256 transitions. [2020-12-22 08:14:47,774 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 7256 transitions. Word has length 216 [2020-12-22 08:14:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:47,775 INFO L481 AbstractCegarLoop]: Abstraction has 4322 states and 7256 transitions. [2020-12-22 08:14:47,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 7256 transitions. [2020-12-22 08:14:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 08:14:47,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:47,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:47,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:14:47,781 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -759647818, now seen corresponding path program 1 times [2020-12-22 08:14:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:47,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235688494] [2020-12-22 08:14:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:47,990 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 08:14:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235688494] [2020-12-22 08:14:47,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:47,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:47,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146903473] [2020-12-22 08:14:47,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:47,993 INFO L87 Difference]: Start difference. First operand 4322 states and 7256 transitions. Second operand 3 states. [2020-12-22 08:14:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:48,238 INFO L93 Difference]: Finished difference Result 7918 states and 13272 transitions. [2020-12-22 08:14:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:48,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 08:14:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:48,271 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 08:14:48,271 INFO L226 Difference]: Without dead ends: 5980 [2020-12-22 08:14:48,277 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 08:14:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2020-12-22 08:14:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5978. [2020-12-22 08:14:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5978 states. [2020-12-22 08:14:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 10006 transitions. [2020-12-22 08:14:48,621 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 10006 transitions. Word has length 220 [2020-12-22 08:14:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:48,621 INFO L481 AbstractCegarLoop]: Abstraction has 5978 states and 10006 transitions. [2020-12-22 08:14:48,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 10006 transitions. [2020-12-22 08:14:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 08:14:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:48,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:48,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:14:48,628 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -808960211, now seen corresponding path program 1 times [2020-12-22 08:14:48,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:48,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311610867] [2020-12-22 08:14:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:48,867 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 08:14:48,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311610867] [2020-12-22 08:14:48,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:48,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:48,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893939511] [2020-12-22 08:14:48,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:48,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:48,870 INFO L87 Difference]: Start difference. First operand 5978 states and 10006 transitions. Second operand 3 states. [2020-12-22 08:14:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:49,302 INFO L93 Difference]: Finished difference Result 16146 states and 26844 transitions. [2020-12-22 08:14:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:49,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 08:14:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:49,354 INFO L225 Difference]: With dead ends: 16146 [2020-12-22 08:14:49,354 INFO L226 Difference]: Without dead ends: 10864 [2020-12-22 08:14:49,365 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 08:14:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2020-12-22 08:14:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 10862. [2020-12-22 08:14:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10862 states. [2020-12-22 08:14:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 18010 transitions. [2020-12-22 08:14:49,929 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 18010 transitions. Word has length 220 [2020-12-22 08:14:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:49,929 INFO L481 AbstractCegarLoop]: Abstraction has 10862 states and 18010 transitions. [2020-12-22 08:14:49,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 18010 transitions. [2020-12-22 08:14:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 08:14:49,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:49,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:49,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:14:49,935 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1627459958, now seen corresponding path program 1 times [2020-12-22 08:14:49,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:49,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852535701] [2020-12-22 08:14:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:50,230 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 08:14:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852535701] [2020-12-22 08:14:50,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:50,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:14:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448411684] [2020-12-22 08:14:50,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:14:50,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:14:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:14:50,235 INFO L87 Difference]: Start difference. First operand 10862 states and 18010 transitions. Second operand 7 states. [2020-12-22 08:14:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:53,942 INFO L93 Difference]: Finished difference Result 72133 states and 119943 transitions. [2020-12-22 08:14:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:14:53,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 224 [2020-12-22 08:14:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:54,122 INFO L225 Difference]: With dead ends: 72133 [2020-12-22 08:14:54,122 INFO L226 Difference]: Without dead ends: 61967 [2020-12-22 08:14:54,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:14:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61967 states. [2020-12-22 08:14:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61967 to 20957. [2020-12-22 08:14:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20957 states. [2020-12-22 08:14:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20957 states to 20957 states and 34594 transitions. [2020-12-22 08:14:56,184 INFO L78 Accepts]: Start accepts. Automaton has 20957 states and 34594 transitions. Word has length 224 [2020-12-22 08:14:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:56,185 INFO L481 AbstractCegarLoop]: Abstraction has 20957 states and 34594 transitions. [2020-12-22 08:14:56,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:14:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 20957 states and 34594 transitions. [2020-12-22 08:14:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:14:56,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:56,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:56,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:14:56,193 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1016729105, now seen corresponding path program 1 times [2020-12-22 08:14:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166158797] [2020-12-22 08:14:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:56,574 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 08:14:56,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166158797] [2020-12-22 08:14:56,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:56,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:14:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816883116] [2020-12-22 08:14:56,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:14:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:14:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:14:56,579 INFO L87 Difference]: Start difference. First operand 20957 states and 34594 transitions. Second operand 4 states. [2020-12-22 08:14:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:58,275 INFO L93 Difference]: Finished difference Result 56884 states and 94261 transitions. [2020-12-22 08:14:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:14:58,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 08:14:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:58,343 INFO L225 Difference]: With dead ends: 56884 [2020-12-22 08:14:58,343 INFO L226 Difference]: Without dead ends: 36685 [2020-12-22 08:14:58,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:14:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36685 states. [2020-12-22 08:15:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36685 to 31436. [2020-12-22 08:15:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31436 states. [2020-12-22 08:15:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31436 states to 31436 states and 51980 transitions. [2020-12-22 08:15:00,212 INFO L78 Accepts]: Start accepts. Automaton has 31436 states and 51980 transitions. Word has length 225 [2020-12-22 08:15:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:00,213 INFO L481 AbstractCegarLoop]: Abstraction has 31436 states and 51980 transitions. [2020-12-22 08:15:00,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:15:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31436 states and 51980 transitions. [2020-12-22 08:15:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:15:00,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:00,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:00,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:15:00,220 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1804910714, now seen corresponding path program 1 times [2020-12-22 08:15:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:00,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254187982] [2020-12-22 08:15:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:00,564 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 08:15:00,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254187982] [2020-12-22 08:15:00,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:00,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:00,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639846858] [2020-12-22 08:15:00,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:00,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:00,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:00,567 INFO L87 Difference]: Start difference. First operand 31436 states and 51980 transitions. Second operand 3 states. [2020-12-22 08:15:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:02,496 INFO L93 Difference]: Finished difference Result 60182 states and 99682 transitions. [2020-12-22 08:15:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:02,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:15:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:02,573 INFO L225 Difference]: With dead ends: 60182 [2020-12-22 08:15:02,574 INFO L226 Difference]: Without dead ends: 44142 [2020-12-22 08:15:02,602 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 08:15:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44142 states. [2020-12-22 08:15:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44142 to 44140. [2020-12-22 08:15:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44140 states. [2020-12-22 08:15:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44140 states to 44140 states and 72868 transitions. [2020-12-22 08:15:05,042 INFO L78 Accepts]: Start accepts. Automaton has 44140 states and 72868 transitions. Word has length 225 [2020-12-22 08:15:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:05,042 INFO L481 AbstractCegarLoop]: Abstraction has 44140 states and 72868 transitions. [2020-12-22 08:15:05,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 44140 states and 72868 transitions. [2020-12-22 08:15:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:15:05,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:05,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:05,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:15:05,049 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1252454586, now seen corresponding path program 1 times [2020-12-22 08:15:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:05,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804280600] [2020-12-22 08:15:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:05,202 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 08:15:05,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804280600] [2020-12-22 08:15:05,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:05,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677956572] [2020-12-22 08:15:05,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:05,205 INFO L87 Difference]: Start difference. First operand 44140 states and 72868 transitions. Second operand 3 states. [2020-12-22 08:15:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:08,185 INFO L93 Difference]: Finished difference Result 83942 states and 138912 transitions. [2020-12-22 08:15:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:08,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:15:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:08,274 INFO L225 Difference]: With dead ends: 83942 [2020-12-22 08:15:08,274 INFO L226 Difference]: Without dead ends: 61178 [2020-12-22 08:15:08,308 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 08:15:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61178 states. [2020-12-22 08:15:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61178 to 61176. [2020-12-22 08:15:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61176 states. [2020-12-22 08:15:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61176 states to 61176 states and 100885 transitions. [2020-12-22 08:15:11,754 INFO L78 Accepts]: Start accepts. Automaton has 61176 states and 100885 transitions. Word has length 225 [2020-12-22 08:15:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:11,755 INFO L481 AbstractCegarLoop]: Abstraction has 61176 states and 100885 transitions. [2020-12-22 08:15:11,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 61176 states and 100885 transitions. [2020-12-22 08:15:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:15:11,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:11,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:11,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:15:11,759 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1749864198, now seen corresponding path program 1 times [2020-12-22 08:15:11,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048837146] [2020-12-22 08:15:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:11,919 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 08:15:11,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048837146] [2020-12-22 08:15:11,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:11,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:11,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129182330] [2020-12-22 08:15:11,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:11,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:11,921 INFO L87 Difference]: Start difference. First operand 61176 states and 100885 transitions. Second operand 3 states. [2020-12-22 08:15:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:16,530 INFO L93 Difference]: Finished difference Result 133880 states and 222085 transitions. [2020-12-22 08:15:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:16,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:15:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:16,665 INFO L225 Difference]: With dead ends: 133880 [2020-12-22 08:15:16,665 INFO L226 Difference]: Without dead ends: 92056 [2020-12-22 08:15:16,721 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 08:15:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92056 states. [2020-12-22 08:15:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92056 to 92054. [2020-12-22 08:15:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92054 states. [2020-12-22 08:15:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92054 states to 92054 states and 151936 transitions. [2020-12-22 08:15:21,754 INFO L78 Accepts]: Start accepts. Automaton has 92054 states and 151936 transitions. Word has length 225 [2020-12-22 08:15:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:21,755 INFO L481 AbstractCegarLoop]: Abstraction has 92054 states and 151936 transitions. [2020-12-22 08:15:21,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 92054 states and 151936 transitions. [2020-12-22 08:15:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:15:21,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:21,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:21,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:15:21,758 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1386769457, now seen corresponding path program 1 times [2020-12-22 08:15:21,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:21,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165886420] [2020-12-22 08:15:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:22,134 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 08:15:22,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165886420] [2020-12-22 08:15:22,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:22,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359352350] [2020-12-22 08:15:22,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:15:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:15:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:15:22,138 INFO L87 Difference]: Start difference. First operand 92054 states and 151936 transitions. Second operand 4 states. [2020-12-22 08:15:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:31,735 INFO L93 Difference]: Finished difference Result 272316 states and 450326 transitions. [2020-12-22 08:15:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:15:31,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-12-22 08:15:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:32,029 INFO L225 Difference]: With dead ends: 272316 [2020-12-22 08:15:32,030 INFO L226 Difference]: Without dead ends: 180899 [2020-12-22 08:15:32,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180899 states. [2020-12-22 08:15:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180899 to 151260. [2020-12-22 08:15:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151260 states. [2020-12-22 08:15:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151260 states to 151260 states and 249206 transitions. [2020-12-22 08:15:40,874 INFO L78 Accepts]: Start accepts. Automaton has 151260 states and 249206 transitions. Word has length 226 [2020-12-22 08:15:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:40,874 INFO L481 AbstractCegarLoop]: Abstraction has 151260 states and 249206 transitions. [2020-12-22 08:15:40,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:15:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 151260 states and 249206 transitions. [2020-12-22 08:15:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-22 08:15:40,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:40,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:40,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:15:40,877 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:40,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:40,878 INFO L82 PathProgramCache]: Analyzing trace with hash -22323496, now seen corresponding path program 1 times [2020-12-22 08:15:40,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:40,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101332075] [2020-12-22 08:15:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:41,063 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 08:15:41,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101332075] [2020-12-22 08:15:41,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:41,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949199786] [2020-12-22 08:15:41,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:15:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:15:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:15:41,066 INFO L87 Difference]: Start difference. First operand 151260 states and 249206 transitions. Second operand 4 states. [2020-12-22 08:15:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:58,018 INFO L93 Difference]: Finished difference Result 446874 states and 737768 transitions. [2020-12-22 08:15:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:15:58,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2020-12-22 08:15:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:58,677 INFO L225 Difference]: With dead ends: 446874 [2020-12-22 08:15:58,678 INFO L226 Difference]: Without dead ends: 296251 [2020-12-22 08:15:58,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296251 states. [2020-12-22 08:16:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296251 to 248190. [2020-12-22 08:16:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248190 states. [2020-12-22 08:16:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248190 states to 248190 states and 408188 transitions. [2020-12-22 08:16:14,211 INFO L78 Accepts]: Start accepts. Automaton has 248190 states and 408188 transitions. Word has length 227 [2020-12-22 08:16:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:14,211 INFO L481 AbstractCegarLoop]: Abstraction has 248190 states and 408188 transitions. [2020-12-22 08:16:14,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:16:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 248190 states and 408188 transitions. [2020-12-22 08:16:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 08:16:14,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:14,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:14,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:16:14,214 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash -749974056, now seen corresponding path program 1 times [2020-12-22 08:16:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:14,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151285440] [2020-12-22 08:16:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:14,388 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 08:16:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151285440] [2020-12-22 08:16:14,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:14,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:16:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031058808] [2020-12-22 08:16:14,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:16:14,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:14,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:16:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:16:14,390 INFO L87 Difference]: Start difference. First operand 248190 states and 408188 transitions. Second operand 4 states.