/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/pals_lcr.6.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:35:40,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:35:40,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:35:40,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:35:40,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:35:40,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:35:40,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:35:40,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:35:40,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:35:40,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:35:40,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:35:40,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:35:40,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:35:40,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:35:40,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:35:40,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:35:40,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:35:40,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:35:40,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:35:40,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:35:40,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:35:40,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:35:40,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:35:40,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:35:40,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:35:40,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:35:40,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:35:40,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:35:40,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:35:40,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:35:40,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:35:40,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:35:40,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:35:40,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:35:40,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:35:40,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:35:40,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:35:40,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:35:40,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:35:40,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:35:40,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:35:40,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:35:40,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:35:40,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:35:40,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:35:40,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:35:40,719 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:35:40,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:35:40,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:35:40,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:35:40,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:35:40,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:35:40,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:35:40,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:35:40,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:35:40,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:35:40,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:35:40,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:35:40,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:35:40,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:35:40,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:35:40,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:35:40,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:35:40,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:35:40,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:35:40,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:35:40,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:35:40,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:35:41,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:35:41,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:35:41,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:35:41,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:35:41,149 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:35:41,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:41,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7ce9af0/ef24a494605a469d933cbfd071985986/FLAG44d10305e [2020-12-22 07:35:41,953 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:35:41,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:41,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7ce9af0/ef24a494605a469d933cbfd071985986/FLAG44d10305e [2020-12-22 07:35:42,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7ce9af0/ef24a494605a469d933cbfd071985986 [2020-12-22 07:35:42,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:35:42,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:35:42,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:42,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:35:42,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:35:42,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:42,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5039632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42, skipping insertion in model container [2020-12-22 07:35:42,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:42,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:35:42,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:35:42,736 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/pals_lcr.6.ufo.BOUNDED-12.pals.c[15075,15088] [2020-12-22 07:35:42,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:42,759 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:35:42,840 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/pals_lcr.6.ufo.BOUNDED-12.pals.c[15075,15088] [2020-12-22 07:35:42,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:42,872 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:35:42,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42 WrapperNode [2020-12-22 07:35:42,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:42,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:42,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:35:42,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:35:42,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:42,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:42,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:42,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:35:42,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:35:42,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:35:42,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:42,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (1/1) ... [2020-12-22 07:35:43,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:35:43,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:35:43,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:35:43,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:35:43,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (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 07:35:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:35:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:35:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:35:43,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:35:44,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:35:44,307 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:35:44,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:44 BoogieIcfgContainer [2020-12-22 07:35:44,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:35:44,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:35:44,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:35:44,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:35:44,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:35:42" (1/3) ... [2020-12-22 07:35:44,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ac4db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:44, skipping insertion in model container [2020-12-22 07:35:44,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:42" (2/3) ... [2020-12-22 07:35:44,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ac4db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:44, skipping insertion in model container [2020-12-22 07:35:44,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:44" (3/3) ... [2020-12-22 07:35:44,322 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:44,330 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:35:44,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:35:44,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:35:44,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:35:44,395 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:35:44,395 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:35:44,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:35:44,396 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:35:44,396 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:35:44,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:35:44,396 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:35:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-12-22 07:35:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:44,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:44,437 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] [2020-12-22 07:35:44,438 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1259035486, now seen corresponding path program 1 times [2020-12-22 07:35:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:44,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935239607] [2020-12-22 07:35:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:44,757 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 07:35:44,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935239607] [2020-12-22 07:35:44,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:35:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010879167] [2020-12-22 07:35:44,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:35:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:35:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:35:44,790 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 2 states. [2020-12-22 07:35:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:44,845 INFO L93 Difference]: Finished difference Result 175 states and 290 transitions. [2020-12-22 07:35:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:35:44,847 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:35:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:44,862 INFO L225 Difference]: With dead ends: 175 [2020-12-22 07:35:44,863 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 07:35:44,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:35:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 07:35:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 07:35:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 07:35:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 181 transitions. [2020-12-22 07:35:44,916 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 181 transitions. Word has length 37 [2020-12-22 07:35:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:44,917 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 181 transitions. [2020-12-22 07:35:44,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:35:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 181 transitions. [2020-12-22 07:35:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:44,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:44,921 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] [2020-12-22 07:35:44,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:35:44,922 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1533795100, now seen corresponding path program 1 times [2020-12-22 07:35:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:44,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580208415] [2020-12-22 07:35:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:45,082 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 07:35:45,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580208415] [2020-12-22 07:35:45,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:45,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:45,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320844610] [2020-12-22 07:35:45,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:35:45,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:35:45,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:35:45,089 INFO L87 Difference]: Start difference. First operand 106 states and 181 transitions. Second operand 5 states. [2020-12-22 07:35:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:45,254 INFO L93 Difference]: Finished difference Result 170 states and 280 transitions. [2020-12-22 07:35:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:35:45,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:35:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:45,258 INFO L225 Difference]: With dead ends: 170 [2020-12-22 07:35:45,258 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 07:35:45,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 07:35:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 07:35:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 07:35:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-12-22 07:35:45,316 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 37 [2020-12-22 07:35:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:45,316 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-12-22 07:35:45,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:35:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-12-22 07:35:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:45,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:45,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:45,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:35:45,320 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1950823117, now seen corresponding path program 1 times [2020-12-22 07:35:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:45,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484447078] [2020-12-22 07:35:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:45,621 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 07:35:45,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484447078] [2020-12-22 07:35:45,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:45,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:45,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487900328] [2020-12-22 07:35:45,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:45,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:45,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:45,625 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 3 states. [2020-12-22 07:35:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:45,661 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2020-12-22 07:35:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:45,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:45,664 INFO L225 Difference]: With dead ends: 220 [2020-12-22 07:35:45,665 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 07:35:45,666 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 07:35:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 07:35:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-12-22 07:35:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 07:35:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 224 transitions. [2020-12-22 07:35:45,686 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 224 transitions. Word has length 76 [2020-12-22 07:35:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:45,686 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 224 transitions. [2020-12-22 07:35:45,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 224 transitions. [2020-12-22 07:35:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:45,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:45,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:45,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:35:45,691 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash 699917825, now seen corresponding path program 1 times [2020-12-22 07:35:45,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:45,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833486816] [2020-12-22 07:35:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:45,824 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 07:35:45,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833486816] [2020-12-22 07:35:45,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:45,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:45,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458799811] [2020-12-22 07:35:45,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:45,828 INFO L87 Difference]: Start difference. First operand 158 states and 224 transitions. Second operand 3 states. [2020-12-22 07:35:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:45,888 INFO L93 Difference]: Finished difference Result 370 states and 560 transitions. [2020-12-22 07:35:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:45,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:45,899 INFO L225 Difference]: With dead ends: 370 [2020-12-22 07:35:45,900 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 07:35:45,905 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 07:35:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 07:35:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-12-22 07:35:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-22 07:35:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2020-12-22 07:35:45,951 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 76 [2020-12-22 07:35:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:45,952 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2020-12-22 07:35:45,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2020-12-22 07:35:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:45,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:45,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:45,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:35:45,956 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -45664905, now seen corresponding path program 1 times [2020-12-22 07:35:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:45,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886794114] [2020-12-22 07:35:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:46,127 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 07:35:46,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886794114] [2020-12-22 07:35:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:46,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:46,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967413037] [2020-12-22 07:35:46,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:46,131 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand 3 states. [2020-12-22 07:35:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:46,184 INFO L93 Difference]: Finished difference Result 652 states and 1005 transitions. [2020-12-22 07:35:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:46,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:46,188 INFO L225 Difference]: With dead ends: 652 [2020-12-22 07:35:46,189 INFO L226 Difference]: Without dead ends: 442 [2020-12-22 07:35:46,190 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 07:35:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-12-22 07:35:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2020-12-22 07:35:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-12-22 07:35:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 667 transitions. [2020-12-22 07:35:46,247 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 667 transitions. Word has length 76 [2020-12-22 07:35:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:46,248 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 667 transitions. [2020-12-22 07:35:46,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 667 transitions. [2020-12-22 07:35:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:46,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:46,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:46,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:35:46,256 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1985695763, now seen corresponding path program 1 times [2020-12-22 07:35:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:46,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840680732] [2020-12-22 07:35:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:46,455 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 07:35:46,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840680732] [2020-12-22 07:35:46,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:46,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:46,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313575059] [2020-12-22 07:35:46,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:46,462 INFO L87 Difference]: Start difference. First operand 440 states and 667 transitions. Second operand 3 states. [2020-12-22 07:35:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:46,540 INFO L93 Difference]: Finished difference Result 1180 states and 1829 transitions. [2020-12-22 07:35:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:46,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:46,549 INFO L225 Difference]: With dead ends: 1180 [2020-12-22 07:35:46,550 INFO L226 Difference]: Without dead ends: 786 [2020-12-22 07:35:46,551 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 07:35:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-12-22 07:35:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 784. [2020-12-22 07:35:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-12-22 07:35:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1199 transitions. [2020-12-22 07:35:46,600 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1199 transitions. Word has length 76 [2020-12-22 07:35:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:46,603 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1199 transitions. [2020-12-22 07:35:46,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1199 transitions. [2020-12-22 07:35:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:46,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:46,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:46,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:35:46,614 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 714986851, now seen corresponding path program 1 times [2020-12-22 07:35:46,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:46,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884396849] [2020-12-22 07:35:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:46,808 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 07:35:46,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884396849] [2020-12-22 07:35:46,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:46,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:35:46,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758156102] [2020-12-22 07:35:46,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:46,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:46,812 INFO L87 Difference]: Start difference. First operand 784 states and 1199 transitions. Second operand 7 states. [2020-12-22 07:35:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:47,148 INFO L93 Difference]: Finished difference Result 2260 states and 3505 transitions. [2020-12-22 07:35:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:47,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-22 07:35:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:47,172 INFO L225 Difference]: With dead ends: 2260 [2020-12-22 07:35:47,172 INFO L226 Difference]: Without dead ends: 1522 [2020-12-22 07:35:47,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:35:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2020-12-22 07:35:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1520. [2020-12-22 07:35:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2020-12-22 07:35:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2343 transitions. [2020-12-22 07:35:47,253 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2343 transitions. Word has length 76 [2020-12-22 07:35:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:47,253 INFO L481 AbstractCegarLoop]: Abstraction has 1520 states and 2343 transitions. [2020-12-22 07:35:47,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2343 transitions. [2020-12-22 07:35:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:47,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:47,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:47,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:35:47,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1224459941, now seen corresponding path program 1 times [2020-12-22 07:35:47,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:47,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442986220] [2020-12-22 07:35:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:47,429 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 07:35:47,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442986220] [2020-12-22 07:35:47,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:47,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:47,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739567867] [2020-12-22 07:35:47,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:47,432 INFO L87 Difference]: Start difference. First operand 1520 states and 2343 transitions. Second operand 8 states. [2020-12-22 07:35:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:48,903 INFO L93 Difference]: Finished difference Result 19208 states and 29907 transitions. [2020-12-22 07:35:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:35:48,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-12-22 07:35:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:49,015 INFO L225 Difference]: With dead ends: 19208 [2020-12-22 07:35:49,015 INFO L226 Difference]: Without dead ends: 17734 [2020-12-22 07:35:49,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17734 states. [2020-12-22 07:35:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17734 to 2992. [2020-12-22 07:35:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-12-22 07:35:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4575 transitions. [2020-12-22 07:35:49,464 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4575 transitions. Word has length 76 [2020-12-22 07:35:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:49,465 INFO L481 AbstractCegarLoop]: Abstraction has 2992 states and 4575 transitions. [2020-12-22 07:35:49,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4575 transitions. [2020-12-22 07:35:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:49,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:49,467 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] [2020-12-22 07:35:49,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:35:49,467 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1530728779, now seen corresponding path program 1 times [2020-12-22 07:35:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:49,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570879104] [2020-12-22 07:35:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:49,549 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 07:35:49,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570879104] [2020-12-22 07:35:49,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:49,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012795768] [2020-12-22 07:35:49,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:49,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:49,561 INFO L87 Difference]: Start difference. First operand 2992 states and 4575 transitions. Second operand 3 states. [2020-12-22 07:35:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:49,926 INFO L93 Difference]: Finished difference Result 7508 states and 11425 transitions. [2020-12-22 07:35:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:49,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:49,971 INFO L225 Difference]: With dead ends: 7508 [2020-12-22 07:35:49,973 INFO L226 Difference]: Without dead ends: 4562 [2020-12-22 07:35:49,980 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 07:35:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2020-12-22 07:35:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 4560. [2020-12-22 07:35:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2020-12-22 07:35:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6799 transitions. [2020-12-22 07:35:50,432 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6799 transitions. Word has length 78 [2020-12-22 07:35:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:50,432 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 6799 transitions. [2020-12-22 07:35:50,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6799 transitions. [2020-12-22 07:35:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:50,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:50,435 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] [2020-12-22 07:35:50,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:35:50,435 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1464235267, now seen corresponding path program 1 times [2020-12-22 07:35:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:50,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189947900] [2020-12-22 07:35:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189947900] [2020-12-22 07:35:50,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:50,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951150976] [2020-12-22 07:35:50,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:50,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:50,890 INFO L87 Difference]: Start difference. First operand 4560 states and 6799 transitions. Second operand 8 states. [2020-12-22 07:35:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:51,845 INFO L93 Difference]: Finished difference Result 11318 states and 16938 transitions. [2020-12-22 07:35:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:35:51,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-12-22 07:35:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:51,864 INFO L225 Difference]: With dead ends: 11318 [2020-12-22 07:35:51,864 INFO L226 Difference]: Without dead ends: 6804 [2020-12-22 07:35:51,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:35:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2020-12-22 07:35:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 4560. [2020-12-22 07:35:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2020-12-22 07:35:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6767 transitions. [2020-12-22 07:35:52,328 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6767 transitions. Word has length 78 [2020-12-22 07:35:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:52,328 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 6767 transitions. [2020-12-22 07:35:52,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6767 transitions. [2020-12-22 07:35:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:52,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:52,330 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] [2020-12-22 07:35:52,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:35:52,330 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash 324678809, now seen corresponding path program 1 times [2020-12-22 07:35:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:52,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541471518] [2020-12-22 07:35:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:52,388 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 07:35:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541471518] [2020-12-22 07:35:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488605519] [2020-12-22 07:35:52,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:52,391 INFO L87 Difference]: Start difference. First operand 4560 states and 6767 transitions. Second operand 3 states. [2020-12-22 07:35:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:53,019 INFO L93 Difference]: Finished difference Result 13012 states and 19249 transitions. [2020-12-22 07:35:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:53,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:53,039 INFO L225 Difference]: With dead ends: 13012 [2020-12-22 07:35:53,039 INFO L226 Difference]: Without dead ends: 8498 [2020-12-22 07:35:53,046 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 07:35:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2020-12-22 07:35:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 8496. [2020-12-22 07:35:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8496 states. [2020-12-22 07:35:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8496 states to 8496 states and 12431 transitions. [2020-12-22 07:35:53,699 INFO L78 Accepts]: Start accepts. Automaton has 8496 states and 12431 transitions. Word has length 78 [2020-12-22 07:35:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:53,699 INFO L481 AbstractCegarLoop]: Abstraction has 8496 states and 12431 transitions. [2020-12-22 07:35:53,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8496 states and 12431 transitions. [2020-12-22 07:35:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:53,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:53,700 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] [2020-12-22 07:35:53,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:35:53,701 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1572186425, now seen corresponding path program 1 times [2020-12-22 07:35:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:53,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067826140] [2020-12-22 07:35:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:53,759 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 07:35:53,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067826140] [2020-12-22 07:35:53,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:53,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:53,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477186455] [2020-12-22 07:35:53,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:53,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:53,762 INFO L87 Difference]: Start difference. First operand 8496 states and 12431 transitions. Second operand 3 states. [2020-12-22 07:35:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:54,846 INFO L93 Difference]: Finished difference Result 24244 states and 35281 transitions. [2020-12-22 07:35:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:54,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:54,882 INFO L225 Difference]: With dead ends: 24244 [2020-12-22 07:35:54,883 INFO L226 Difference]: Without dead ends: 15794 [2020-12-22 07:35:54,894 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 07:35:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15794 states. [2020-12-22 07:35:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15794 to 15792. [2020-12-22 07:35:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15792 states. [2020-12-22 07:35:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15792 states to 15792 states and 22703 transitions. [2020-12-22 07:35:56,011 INFO L78 Accepts]: Start accepts. Automaton has 15792 states and 22703 transitions. Word has length 78 [2020-12-22 07:35:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:56,012 INFO L481 AbstractCegarLoop]: Abstraction has 15792 states and 22703 transitions. [2020-12-22 07:35:56,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15792 states and 22703 transitions. [2020-12-22 07:35:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:35:56,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:56,013 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] [2020-12-22 07:35:56,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:35:56,014 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash -158143790, now seen corresponding path program 1 times [2020-12-22 07:35:56,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:56,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923777917] [2020-12-22 07:35:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:56,071 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 07:35:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923777917] [2020-12-22 07:35:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:56,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438790290] [2020-12-22 07:35:56,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:56,073 INFO L87 Difference]: Start difference. First operand 15792 states and 22703 transitions. Second operand 3 states. [2020-12-22 07:35:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:57,365 INFO L93 Difference]: Finished difference Result 33942 states and 48851 transitions. [2020-12-22 07:35:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:57,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:35:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:57,414 INFO L225 Difference]: With dead ends: 33942 [2020-12-22 07:35:57,414 INFO L226 Difference]: Without dead ends: 18196 [2020-12-22 07:35:57,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:35:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18196 states. [2020-12-22 07:35:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18196 to 18194. [2020-12-22 07:35:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18194 states. [2020-12-22 07:35:58,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18194 states to 18194 states and 26097 transitions. [2020-12-22 07:35:58,699 INFO L78 Accepts]: Start accepts. Automaton has 18194 states and 26097 transitions. Word has length 79 [2020-12-22 07:35:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:58,700 INFO L481 AbstractCegarLoop]: Abstraction has 18194 states and 26097 transitions. [2020-12-22 07:35:58,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18194 states and 26097 transitions. [2020-12-22 07:35:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:35:58,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:58,701 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] [2020-12-22 07:35:58,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:35:58,702 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1438624019, now seen corresponding path program 1 times [2020-12-22 07:35:58,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:58,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480363858] [2020-12-22 07:35:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:58,801 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 07:35:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480363858] [2020-12-22 07:35:58,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:58,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020188568] [2020-12-22 07:35:58,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:58,804 INFO L87 Difference]: Start difference. First operand 18194 states and 26097 transitions. Second operand 8 states. [2020-12-22 07:36:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:00,625 INFO L93 Difference]: Finished difference Result 29143 states and 41617 transitions. [2020-12-22 07:36:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:36:00,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 07:36:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:00,671 INFO L225 Difference]: With dead ends: 29143 [2020-12-22 07:36:00,672 INFO L226 Difference]: Without dead ends: 29141 [2020-12-22 07:36:00,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:36:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29141 states. [2020-12-22 07:36:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29141 to 18578. [2020-12-22 07:36:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18578 states. [2020-12-22 07:36:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18578 states to 18578 states and 26321 transitions. [2020-12-22 07:36:02,250 INFO L78 Accepts]: Start accepts. Automaton has 18578 states and 26321 transitions. Word has length 79 [2020-12-22 07:36:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,251 INFO L481 AbstractCegarLoop]: Abstraction has 18578 states and 26321 transitions. [2020-12-22 07:36:02,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18578 states and 26321 transitions. [2020-12-22 07:36:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:02,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:02,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:36:02,266 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1530216785, now seen corresponding path program 1 times [2020-12-22 07:36:02,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378049685] [2020-12-22 07:36:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:36:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378049685] [2020-12-22 07:36:02,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:02,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748361029] [2020-12-22 07:36:02,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:02,428 INFO L87 Difference]: Start difference. First operand 18578 states and 26321 transitions. Second operand 8 states. [2020-12-22 07:36:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:09,945 INFO L93 Difference]: Finished difference Result 136512 states and 193352 transitions. [2020-12-22 07:36:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:09,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:10,293 INFO L225 Difference]: With dead ends: 136512 [2020-12-22 07:36:10,294 INFO L226 Difference]: Without dead ends: 117982 [2020-12-22 07:36:10,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117982 states. [2020-12-22 07:36:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117982 to 37106. [2020-12-22 07:36:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37106 states. [2020-12-22 07:36:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37106 states to 37106 states and 52369 transitions. [2020-12-22 07:36:13,720 INFO L78 Accepts]: Start accepts. Automaton has 37106 states and 52369 transitions. Word has length 111 [2020-12-22 07:36:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:13,721 INFO L481 AbstractCegarLoop]: Abstraction has 37106 states and 52369 transitions. [2020-12-22 07:36:13,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 37106 states and 52369 transitions. [2020-12-22 07:36:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:13,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:13,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:13,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:36:13,733 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1517242895, now seen corresponding path program 1 times [2020-12-22 07:36:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:13,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639064526] [2020-12-22 07:36:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:36:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639064526] [2020-12-22 07:36:13,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:13,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777658572] [2020-12-22 07:36:13,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:13,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:13,870 INFO L87 Difference]: Start difference. First operand 37106 states and 52369 transitions. Second operand 8 states. [2020-12-22 07:36:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:22,974 INFO L93 Difference]: Finished difference Result 155040 states and 219400 transitions. [2020-12-22 07:36:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:22,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:23,129 INFO L225 Difference]: With dead ends: 155040 [2020-12-22 07:36:23,129 INFO L226 Difference]: Without dead ends: 136510 [2020-12-22 07:36:23,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136510 states. [2020-12-22 07:36:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136510 to 64786. [2020-12-22 07:36:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64786 states. [2020-12-22 07:36:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64786 states to 64786 states and 91169 transitions. [2020-12-22 07:36:28,834 INFO L78 Accepts]: Start accepts. Automaton has 64786 states and 91169 transitions. Word has length 111 [2020-12-22 07:36:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:28,835 INFO L481 AbstractCegarLoop]: Abstraction has 64786 states and 91169 transitions. [2020-12-22 07:36:28,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64786 states and 91169 transitions. [2020-12-22 07:36:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:28,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:28,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:28,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:36:28,849 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -47809913, now seen corresponding path program 1 times [2020-12-22 07:36:28,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:28,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341101669] [2020-12-22 07:36:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:36:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341101669] [2020-12-22 07:36:29,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:29,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:29,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975425580] [2020-12-22 07:36:29,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:29,015 INFO L87 Difference]: Start difference. First operand 64786 states and 91169 transitions. Second operand 8 states. [2020-12-22 07:36:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:40,565 INFO L93 Difference]: Finished difference Result 173568 states and 245448 transitions. [2020-12-22 07:36:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:40,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:40,926 INFO L225 Difference]: With dead ends: 173568 [2020-12-22 07:36:40,926 INFO L226 Difference]: Without dead ends: 155038 [2020-12-22 07:36:40,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155038 states. [2020-12-22 07:36:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155038 to 83314. [2020-12-22 07:36:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83314 states. [2020-12-22 07:36:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83314 states to 83314 states and 117217 transitions. [2020-12-22 07:36:47,816 INFO L78 Accepts]: Start accepts. Automaton has 83314 states and 117217 transitions. Word has length 111 [2020-12-22 07:36:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:47,816 INFO L481 AbstractCegarLoop]: Abstraction has 83314 states and 117217 transitions. [2020-12-22 07:36:47,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 83314 states and 117217 transitions. [2020-12-22 07:36:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:47,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:47,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:47,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:36:47,833 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1283268953, now seen corresponding path program 1 times [2020-12-22 07:36:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:47,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663887701] [2020-12-22 07:36:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:36:48,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663887701] [2020-12-22 07:36:48,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:48,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:48,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709234316] [2020-12-22 07:36:48,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:48,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:48,189 INFO L87 Difference]: Start difference. First operand 83314 states and 117217 transitions. Second operand 8 states. [2020-12-22 07:37:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:00,979 INFO L93 Difference]: Finished difference Result 192096 states and 271496 transitions. [2020-12-22 07:37:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:00,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:37:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:01,210 INFO L225 Difference]: With dead ends: 192096 [2020-12-22 07:37:01,210 INFO L226 Difference]: Without dead ends: 173566 [2020-12-22 07:37:01,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173566 states. [2020-12-22 07:37:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173566 to 101842. [2020-12-22 07:37:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101842 states. [2020-12-22 07:37:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101842 states to 101842 states and 143265 transitions. [2020-12-22 07:37:10,211 INFO L78 Accepts]: Start accepts. Automaton has 101842 states and 143265 transitions. Word has length 111 [2020-12-22 07:37:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 101842 states and 143265 transitions. [2020-12-22 07:37:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 101842 states and 143265 transitions. [2020-12-22 07:37:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:37:10,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:10,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:10,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:37:10,228 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1590702791, now seen corresponding path program 1 times [2020-12-22 07:37:10,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:10,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850121671] [2020-12-22 07:37:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:37:10,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850121671] [2020-12-22 07:37:10,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:10,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:10,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336135324] [2020-12-22 07:37:10,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:10,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:10,380 INFO L87 Difference]: Start difference. First operand 101842 states and 143265 transitions. Second operand 8 states. [2020-12-22 07:37:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:25,860 INFO L93 Difference]: Finished difference Result 210624 states and 297544 transitions. [2020-12-22 07:37:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:25,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:37:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:26,279 INFO L225 Difference]: With dead ends: 210624 [2020-12-22 07:37:26,279 INFO L226 Difference]: Without dead ends: 192094 [2020-12-22 07:37:26,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192094 states. [2020-12-22 07:37:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192094 to 120370. [2020-12-22 07:37:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120370 states. [2020-12-22 07:37:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120370 states to 120370 states and 169313 transitions. [2020-12-22 07:37:37,238 INFO L78 Accepts]: Start accepts. Automaton has 120370 states and 169313 transitions. Word has length 111 [2020-12-22 07:37:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:37,238 INFO L481 AbstractCegarLoop]: Abstraction has 120370 states and 169313 transitions. [2020-12-22 07:37:37,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 120370 states and 169313 transitions. [2020-12-22 07:37:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:37:37,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:37,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:37,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:37:37,255 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1024882407, now seen corresponding path program 1 times [2020-12-22 07:37:37,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:37,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108647420] [2020-12-22 07:37:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:37,590 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-12-22 07:37:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:37:37,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108647420] [2020-12-22 07:37:37,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:37,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:37,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780440599] [2020-12-22 07:37:37,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:37,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:37,667 INFO L87 Difference]: Start difference. First operand 120370 states and 169313 transitions. Second operand 8 states. [2020-12-22 07:37:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:55,481 INFO L93 Difference]: Finished difference Result 224352 states and 316872 transitions. [2020-12-22 07:37:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:55,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:37:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:55,933 INFO L225 Difference]: With dead ends: 224352 [2020-12-22 07:37:55,933 INFO L226 Difference]: Without dead ends: 208222 [2020-12-22 07:37:55,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208222 states. [2020-12-22 07:38:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208222 to 136498. [2020-12-22 07:38:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136498 states. [2020-12-22 07:38:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 192033 transitions. [2020-12-22 07:38:09,282 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 192033 transitions. Word has length 111 [2020-12-22 07:38:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:09,283 INFO L481 AbstractCegarLoop]: Abstraction has 136498 states and 192033 transitions. [2020-12-22 07:38:09,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:38:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 192033 transitions. [2020-12-22 07:38:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:38:09,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:09,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:09,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:38:09,308 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1441172198, now seen corresponding path program 1 times [2020-12-22 07:38:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:09,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282739929] [2020-12-22 07:38:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:09,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282739929] [2020-12-22 07:38:09,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:09,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:09,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73212409] [2020-12-22 07:38:09,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:09,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:09,396 INFO L87 Difference]: Start difference. First operand 136498 states and 192033 transitions. Second operand 3 states. [2020-12-22 07:38:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:22,001 INFO L93 Difference]: Finished difference Result 272950 states and 384019 transitions. [2020-12-22 07:38:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:22,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:38:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:22,207 INFO L225 Difference]: With dead ends: 272950 [2020-12-22 07:38:22,208 INFO L226 Difference]: Without dead ends: 136500 [2020-12-22 07:38:22,290 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 07:38:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136500 states. [2020-12-22 07:38:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136500 to 136498. [2020-12-22 07:38:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136498 states. [2020-12-22 07:38:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 190385 transitions. [2020-12-22 07:38:35,448 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 190385 transitions. Word has length 112 [2020-12-22 07:38:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:35,448 INFO L481 AbstractCegarLoop]: Abstraction has 136498 states and 190385 transitions. [2020-12-22 07:38:35,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 190385 transitions. [2020-12-22 07:38:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:38:35,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:35,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:35,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:38:35,459 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1528290992, now seen corresponding path program 1 times [2020-12-22 07:38:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:35,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481162196] [2020-12-22 07:38:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:35,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481162196] [2020-12-22 07:38:35,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:35,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:35,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50235438] [2020-12-22 07:38:35,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:35,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:35,780 INFO L87 Difference]: Start difference. First operand 136498 states and 190385 transitions. Second operand 3 states. [2020-12-22 07:38:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:42,227 INFO L93 Difference]: Finished difference Result 204726 states and 285555 transitions. [2020-12-22 07:38:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:42,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:38:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:42,337 INFO L225 Difference]: With dead ends: 204726 [2020-12-22 07:38:42,337 INFO L226 Difference]: Without dead ends: 68276 [2020-12-22 07:38:42,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68276 states.