/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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:58:30,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:58:30,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:58:30,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:58:30,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:58:30,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:58:30,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:58:30,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:58:30,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:58:30,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:58:30,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:58:30,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:58:30,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:58:30,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:58:30,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:58:30,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:58:30,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:58:30,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:58:30,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:58:30,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:58:30,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:58:30,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:58:30,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:58:30,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:58:30,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:58:30,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:58:30,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:58:30,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:58:30,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:58:30,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:58:30,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:58:30,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:58:30,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:58:30,829 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:58:30,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:58:30,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:58:30,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:58:30,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:58:30,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:58:30,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:58:30,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:58:30,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:58:30,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:58:30,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:58:30,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:58:30,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:58:30,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:58:30,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:58:30,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:58:30,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:58:30,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:58:30,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:58:30,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:58:30,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:58:30,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:58:31,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:58:31,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:58:31,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:58:31,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:58:31,266 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:58:31,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:58:31,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548807123/fe4f070af49041a097774174299d31fe/FLAGa62e65305 [2020-12-22 09:58:32,332 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:58:32,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:58:32,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548807123/fe4f070af49041a097774174299d31fe/FLAGa62e65305 [2020-12-22 09:58:32,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548807123/fe4f070af49041a097774174299d31fe [2020-12-22 09:58:32,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:58:32,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:58:32,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:58:32,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:58:32,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:58:32,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:58:32" (1/1) ... [2020-12-22 09:58:32,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eea1dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:32, skipping insertion in model container [2020-12-22 09:58:32,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:58:32" (1/1) ... [2020-12-22 09:58:32,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:58:32,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:58:33,396 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c[11758,11771] [2020-12-22 09:58:33,482 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c[15022,15035] [2020-12-22 09:58:34,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:58:34,525 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:58:34,565 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c[11758,11771] [2020-12-22 09:58:34,575 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c[15022,15035] [2020-12-22 09:58:35,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:58:35,350 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:58:35,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35 WrapperNode [2020-12-22 09:58:35,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:58:35,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:58:35,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:58:35,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:58:35,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:35,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:35,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:58:35,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:58:35,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:58:35,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:58:35,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:35,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:35,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:35,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:36,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:36,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:36,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (1/1) ... [2020-12-22 09:58:36,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:58:36,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:58:36,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:58:36,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:58:36,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (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 09:58:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:58:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:58:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:58:36,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:58:43,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:58:43,506 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:58:43,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:58:43 BoogieIcfgContainer [2020-12-22 09:58:43,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:58:43,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:58:43,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:58:43,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:58:43,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:58:32" (1/3) ... [2020-12-22 09:58:43,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c64728c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:58:43, skipping insertion in model container [2020-12-22 09:58:43,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:35" (2/3) ... [2020-12-22 09:58:43,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c64728c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:58:43, skipping insertion in model container [2020-12-22 09:58:43,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:58:43" (3/3) ... [2020-12-22 09:58:43,526 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:58:43,533 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:58:43,539 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:58:43,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:58:43,599 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:58:43,602 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:58:43,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:58:43,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:58:43,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:58:43,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:58:43,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:58:43,607 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:58:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:58:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:58:43,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:43,654 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] [2020-12-22 09:58:43,654 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1137153427, now seen corresponding path program 1 times [2020-12-22 09:58:43,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:43,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630208167] [2020-12-22 09:58:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:44,067 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 09:58:44,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630208167] [2020-12-22 09:58:44,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:44,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:58:44,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606699061] [2020-12-22 09:58:44,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:44,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:44,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:44,098 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 3 states. [2020-12-22 09:58:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:53,623 INFO L93 Difference]: Finished difference Result 2552 states and 4894 transitions. [2020-12-22 09:58:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:53,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 09:58:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:53,689 INFO L225 Difference]: With dead ends: 2552 [2020-12-22 09:58:53,689 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:58:53,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:58:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:58:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:58:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:58:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2570 transitions. [2020-12-22 09:58:53,848 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2570 transitions. Word has length 30 [2020-12-22 09:58:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:53,849 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2570 transitions. [2020-12-22 09:58:53,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2570 transitions. [2020-12-22 09:58:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:58:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:53,851 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] [2020-12-22 09:58:53,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:58:53,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:58:53,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634815667] [2020-12-22 09:58:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:53,985 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 09:58:53,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634815667] [2020-12-22 09:58:53,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:53,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:53,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560176332] [2020-12-22 09:58:53,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:58:53,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:58:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:58:53,990 INFO L87 Difference]: Start difference. First operand 1595 states and 2570 transitions. Second operand 5 states. [2020-12-22 09:58:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:54,139 INFO L93 Difference]: Finished difference Result 1652 states and 2658 transitions. [2020-12-22 09:58:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:58:54,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:58:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:54,149 INFO L225 Difference]: With dead ends: 1652 [2020-12-22 09:58:54,150 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:58:54,151 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 09:58:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:58:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:58:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:58:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2539 transitions. [2020-12-22 09:58:54,195 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2539 transitions. Word has length 34 [2020-12-22 09:58:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:54,195 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2539 transitions. [2020-12-22 09:58:54,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:58:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2539 transitions. [2020-12-22 09:58:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:58:54,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:54,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:54,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:58:54,199 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:58:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:54,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246352554] [2020-12-22 09:58:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:54,322 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 09:58:54,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246352554] [2020-12-22 09:58:54,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:54,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019850829] [2020-12-22 09:58:54,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:54,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:54,332 INFO L87 Difference]: Start difference. First operand 1595 states and 2539 transitions. Second operand 3 states. [2020-12-22 09:58:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:54,384 INFO L93 Difference]: Finished difference Result 1695 states and 2697 transitions. [2020-12-22 09:58:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:54,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:58:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:54,395 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:58:54,396 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:58:54,398 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 09:58:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:58:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:58:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:58:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2611 transitions. [2020-12-22 09:58:54,460 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2611 transitions. Word has length 64 [2020-12-22 09:58:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:54,461 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2611 transitions. [2020-12-22 09:58:54,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2611 transitions. [2020-12-22 09:58:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:58:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:54,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:54,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:58:54,469 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:58:54,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:54,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227697965] [2020-12-22 09:58:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:54,621 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 09:58:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227697965] [2020-12-22 09:58:54,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:54,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:54,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071596079] [2020-12-22 09:58:54,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:54,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:54,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:54,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:54,624 INFO L87 Difference]: Start difference. First operand 1640 states and 2611 transitions. Second operand 7 states. [2020-12-22 09:58:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:55,039 INFO L93 Difference]: Finished difference Result 2620 states and 4171 transitions. [2020-12-22 09:58:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:58:55,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:58:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:55,054 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:58:55,054 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:58:55,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:58:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:58:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:58:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:58:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2762 transitions. [2020-12-22 09:58:55,117 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2762 transitions. Word has length 64 [2020-12-22 09:58:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:55,117 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 2762 transitions. [2020-12-22 09:58:55,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2762 transitions. [2020-12-22 09:58:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:58:55,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:55,119 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] [2020-12-22 09:58:55,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:58:55,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:58:55,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:55,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496839858] [2020-12-22 09:58:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:55,264 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 09:58:55,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496839858] [2020-12-22 09:58:55,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:55,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826443551] [2020-12-22 09:58:55,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:55,270 INFO L87 Difference]: Start difference. First operand 1736 states and 2762 transitions. Second operand 3 states. [2020-12-22 09:58:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:55,344 INFO L93 Difference]: Finished difference Result 2102 states and 3338 transitions. [2020-12-22 09:58:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:55,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:58:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:55,358 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:58:55,359 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:58:55,361 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 09:58:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:58:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:58:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:58:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3016 transitions. [2020-12-22 09:58:55,434 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3016 transitions. Word has length 66 [2020-12-22 09:58:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:55,436 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3016 transitions. [2020-12-22 09:58:55,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3016 transitions. [2020-12-22 09:58:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:58:55,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:55,438 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] [2020-12-22 09:58:55,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:58:55,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:58:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:55,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859818543] [2020-12-22 09:58:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:55,782 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 09:58:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859818543] [2020-12-22 09:58:55,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:55,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094909716] [2020-12-22 09:58:55,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:55,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:55,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:55,784 INFO L87 Difference]: Start difference. First operand 1902 states and 3016 transitions. Second operand 7 states. [2020-12-22 09:58:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:56,156 INFO L93 Difference]: Finished difference Result 2264 states and 3578 transitions. [2020-12-22 09:58:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:56,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:58:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:56,167 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:58:56,168 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:58:56,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:58:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:58:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:58:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:58:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3012 transitions. [2020-12-22 09:58:56,237 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3012 transitions. Word has length 66 [2020-12-22 09:58:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:56,238 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3012 transitions. [2020-12-22 09:58:56,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3012 transitions. [2020-12-22 09:58:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:58:56,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:56,240 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] [2020-12-22 09:58:56,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:58:56,245 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:58:56,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:56,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147876939] [2020-12-22 09:58:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:56,329 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 09:58:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147876939] [2020-12-22 09:58:56,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708957977] [2020-12-22 09:58:56,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:56,333 INFO L87 Difference]: Start difference. First operand 1902 states and 3012 transitions. Second operand 3 states. [2020-12-22 09:58:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:56,466 INFO L93 Difference]: Finished difference Result 2574 states and 4046 transitions. [2020-12-22 09:58:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:56,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:58:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:56,479 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:58:56,479 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:58:56,482 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 09:58:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:58:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:58:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:58:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3480 transitions. [2020-12-22 09:58:56,570 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3480 transitions. Word has length 66 [2020-12-22 09:58:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:56,570 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3480 transitions. [2020-12-22 09:58:56,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3480 transitions. [2020-12-22 09:58:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:58:56,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:56,572 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] [2020-12-22 09:58:56,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:58:56,572 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:58:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:56,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616740800] [2020-12-22 09:58:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:56,644 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 09:58:56,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616740800] [2020-12-22 09:58:56,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:56,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927911030] [2020-12-22 09:58:56,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:56,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:56,647 INFO L87 Difference]: Start difference. First operand 2212 states and 3480 transitions. Second operand 3 states. [2020-12-22 09:58:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:56,758 INFO L93 Difference]: Finished difference Result 3456 states and 5370 transitions. [2020-12-22 09:58:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:56,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:58:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:56,775 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:58:56,775 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:58:56,778 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 09:58:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:58:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:58:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:58:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4328 transitions. [2020-12-22 09:58:56,902 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4328 transitions. Word has length 66 [2020-12-22 09:58:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:56,902 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4328 transitions. [2020-12-22 09:58:56,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4328 transitions. [2020-12-22 09:58:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:58:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:56,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:56,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:58:56,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:58:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:56,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969636440] [2020-12-22 09:58:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:56,973 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 09:58:56,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969636440] [2020-12-22 09:58:56,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:56,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:56,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52139492] [2020-12-22 09:58:56,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:56,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:56,977 INFO L87 Difference]: Start difference. First operand 2784 states and 4328 transitions. Second operand 3 states. [2020-12-22 09:58:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:57,151 INFO L93 Difference]: Finished difference Result 5076 states and 7754 transitions. [2020-12-22 09:58:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:57,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:58:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:57,172 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:58:57,172 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:58:57,175 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 09:58:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:58:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:58:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:58:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5848 transitions. [2020-12-22 09:58:57,373 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5848 transitions. Word has length 66 [2020-12-22 09:58:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:57,373 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 5848 transitions. [2020-12-22 09:58:57,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5848 transitions. [2020-12-22 09:58:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:58:57,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:57,381 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] [2020-12-22 09:58:57,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:58:57,382 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:57,382 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:58:57,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:57,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550605996] [2020-12-22 09:58:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:57,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550605996] [2020-12-22 09:58:57,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:57,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546858843] [2020-12-22 09:58:57,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:58:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:58:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:58:57,514 INFO L87 Difference]: Start difference. First operand 3832 states and 5848 transitions. Second operand 5 states. [2020-12-22 09:58:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:57,873 INFO L93 Difference]: Finished difference Result 5558 states and 8350 transitions. [2020-12-22 09:58:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:57,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:58:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:57,920 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:58:57,921 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:58:57,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:58:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:58:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:58:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:58:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5928 transitions. [2020-12-22 09:58:58,169 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5928 transitions. Word has length 67 [2020-12-22 09:58:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:58,169 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 5928 transitions. [2020-12-22 09:58:58,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:58:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5928 transitions. [2020-12-22 09:58:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:58:58,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:58,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:58:58,171 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:58:58,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:58,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028810645] [2020-12-22 09:58:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:58,234 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 09:58:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028810645] [2020-12-22 09:58:58,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:58,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966961295] [2020-12-22 09:58:58,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:58,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:58,238 INFO L87 Difference]: Start difference. First operand 3928 states and 5928 transitions. Second operand 3 states. [2020-12-22 09:58:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:58,504 INFO L93 Difference]: Finished difference Result 6367 states and 9518 transitions. [2020-12-22 09:58:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:58,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:58:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:58,518 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:58:58,518 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:58:58,522 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 09:58:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:58:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:58:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:58:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7482 transitions. [2020-12-22 09:58:58,945 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7482 transitions. Word has length 68 [2020-12-22 09:58:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:58,945 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7482 transitions. [2020-12-22 09:58:58,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7482 transitions. [2020-12-22 09:58:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:58:58,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:58,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-12-22 09:58:58,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:58:58,951 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:58:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965459840] [2020-12-22 09:58:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:58:59,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965459840] [2020-12-22 09:58:59,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:59,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372283364] [2020-12-22 09:58:59,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:59,135 INFO L87 Difference]: Start difference. First operand 5018 states and 7482 transitions. Second operand 7 states. [2020-12-22 09:59:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:00,520 INFO L93 Difference]: Finished difference Result 23094 states and 33584 transitions. [2020-12-22 09:59:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:00,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:00,570 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:59:00,571 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:59:00,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:59:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:59:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:59:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12458 transitions. [2020-12-22 09:59:01,209 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12458 transitions. Word has length 94 [2020-12-22 09:59:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:01,209 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12458 transitions. [2020-12-22 09:59:01,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12458 transitions. [2020-12-22 09:59:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:01,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:01,213 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:59:01,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:59:01,214 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:59:01,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:01,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295898324] [2020-12-22 09:59:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:59:01,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295898324] [2020-12-22 09:59:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:01,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003274586] [2020-12-22 09:59:01,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:01,369 INFO L87 Difference]: Start difference. First operand 8490 states and 12458 transitions. Second operand 7 states. [2020-12-22 09:59:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:02,699 INFO L93 Difference]: Finished difference Result 26566 states and 38560 transitions. [2020-12-22 09:59:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:02,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:02,747 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:59:02,747 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:59:02,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:59:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:59:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:59:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19882 transitions. [2020-12-22 09:59:03,753 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19882 transitions. Word has length 94 [2020-12-22 09:59:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:03,753 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19882 transitions. [2020-12-22 09:59:03,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19882 transitions. [2020-12-22 09:59:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:03,758 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:59:03,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:59:03,759 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:59:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529627841] [2020-12-22 09:59:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:59:03,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529627841] [2020-12-22 09:59:03,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:03,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67158153] [2020-12-22 09:59:03,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:03,904 INFO L87 Difference]: Start difference. First operand 13706 states and 19882 transitions. Second operand 7 states. [2020-12-22 09:59:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:05,166 INFO L93 Difference]: Finished difference Result 30038 states and 43536 transitions. [2020-12-22 09:59:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:05,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:05,219 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:59:05,219 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:59:05,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:59:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:59:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:59:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24858 transitions. [2020-12-22 09:59:06,089 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24858 transitions. Word has length 94 [2020-12-22 09:59:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:06,089 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24858 transitions. [2020-12-22 09:59:06,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24858 transitions. [2020-12-22 09:59:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:06,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:06,094 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:59:06,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:59:06,095 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:59:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:06,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433331986] [2020-12-22 09:59:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:06,233 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 09:59:06,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433331986] [2020-12-22 09:59:06,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:06,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213482863] [2020-12-22 09:59:06,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:06,236 INFO L87 Difference]: Start difference. First operand 17178 states and 24858 transitions. Second operand 7 states. [2020-12-22 09:59:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:07,633 INFO L93 Difference]: Finished difference Result 33510 states and 48512 transitions. [2020-12-22 09:59:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:07,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:07,697 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:59:07,697 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:59:07,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:59:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:59:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:59:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29834 transitions. [2020-12-22 09:59:08,917 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29834 transitions. Word has length 94 [2020-12-22 09:59:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:08,918 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29834 transitions. [2020-12-22 09:59:08,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29834 transitions. [2020-12-22 09:59:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:59:08,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:08,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-12-22 09:59:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:59:08,923 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:59:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753902296] [2020-12-22 09:59:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753902296] [2020-12-22 09:59:09,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:09,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:09,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132608213] [2020-12-22 09:59:09,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:09,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:09,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:09,003 INFO L87 Difference]: Start difference. First operand 20650 states and 29834 transitions. Second operand 3 states. [2020-12-22 09:59:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:09,846 INFO L93 Difference]: Finished difference Result 34059 states and 49231 transitions. [2020-12-22 09:59:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:09,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:59:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:09,871 INFO L225 Difference]: With dead ends: 34059 [2020-12-22 09:59:09,872 INFO L226 Difference]: Without dead ends: 14953 [2020-12-22 09:59:09,895 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 09:59:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14953 states. [2020-12-22 09:59:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14953 to 14951. [2020-12-22 09:59:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14951 states. [2020-12-22 09:59:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 21676 transitions. [2020-12-22 09:59:10,623 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 21676 transitions. Word has length 96 [2020-12-22 09:59:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:10,624 INFO L481 AbstractCegarLoop]: Abstraction has 14951 states and 21676 transitions. [2020-12-22 09:59:10,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 21676 transitions. [2020-12-22 09:59:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:59:10,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:10,629 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:59:10,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:59:10,629 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:59:10,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:10,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021395070] [2020-12-22 09:59:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:10,770 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 09:59:10,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021395070] [2020-12-22 09:59:10,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:10,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:10,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830700046] [2020-12-22 09:59:10,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:10,773 INFO L87 Difference]: Start difference. First operand 14951 states and 21676 transitions. Second operand 7 states. [2020-12-22 09:59:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:12,483 INFO L93 Difference]: Finished difference Result 27123 states and 39282 transitions. [2020-12-22 09:59:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:12,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:59:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:12,517 INFO L225 Difference]: With dead ends: 27123 [2020-12-22 09:59:12,517 INFO L226 Difference]: Without dead ends: 24689 [2020-12-22 09:59:12,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24689 states. [2020-12-22 09:59:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24689 to 17383. [2020-12-22 09:59:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17383 states. [2020-12-22 09:59:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 25164 transitions. [2020-12-22 09:59:13,541 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 25164 transitions. Word has length 96 [2020-12-22 09:59:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:13,541 INFO L481 AbstractCegarLoop]: Abstraction has 17383 states and 25164 transitions. [2020-12-22 09:59:13,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 25164 transitions. [2020-12-22 09:59:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:13,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:13,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 09:59:13,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:59:13,547 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:59:13,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:13,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269282304] [2020-12-22 09:59:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:13,612 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 09:59:13,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269282304] [2020-12-22 09:59:13,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:13,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:13,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126289383] [2020-12-22 09:59:13,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:13,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:13,614 INFO L87 Difference]: Start difference. First operand 17383 states and 25164 transitions. Second operand 3 states. [2020-12-22 09:59:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:14,141 INFO L93 Difference]: Finished difference Result 25291 states and 36502 transitions. [2020-12-22 09:59:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:14,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:14,158 INFO L225 Difference]: With dead ends: 25291 [2020-12-22 09:59:14,159 INFO L226 Difference]: Without dead ends: 9481 [2020-12-22 09:59:14,179 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 09:59:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2020-12-22 09:59:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 9479. [2020-12-22 09:59:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9479 states. [2020-12-22 09:59:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 13724 transitions. [2020-12-22 09:59:14,763 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 13724 transitions. Word has length 97 [2020-12-22 09:59:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:14,763 INFO L481 AbstractCegarLoop]: Abstraction has 9479 states and 13724 transitions. [2020-12-22 09:59:14,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 13724 transitions. [2020-12-22 09:59:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:14,767 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] [2020-12-22 09:59:14,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:59:14,767 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:14,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:59:14,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:14,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236217839] [2020-12-22 09:59:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:14,829 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 09:59:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236217839] [2020-12-22 09:59:14,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:14,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842443682] [2020-12-22 09:59:14,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:14,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:14,833 INFO L87 Difference]: Start difference. First operand 9479 states and 13724 transitions. Second operand 3 states. [2020-12-22 09:59:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:15,087 INFO L93 Difference]: Finished difference Result 13435 states and 19342 transitions. [2020-12-22 09:59:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:15,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:15,093 INFO L225 Difference]: With dead ends: 13435 [2020-12-22 09:59:15,093 INFO L226 Difference]: Without dead ends: 5529 [2020-12-22 09:59:15,101 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 09:59:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2020-12-22 09:59:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5527. [2020-12-22 09:59:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5527 states. [2020-12-22 09:59:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8056 transitions. [2020-12-22 09:59:15,359 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 8056 transitions. Word has length 97 [2020-12-22 09:59:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:15,359 INFO L481 AbstractCegarLoop]: Abstraction has 5527 states and 8056 transitions. [2020-12-22 09:59:15,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 8056 transitions. [2020-12-22 09:59:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:15,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:15,362 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] [2020-12-22 09:59:15,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:59:15,362 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:59:15,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:15,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829979300] [2020-12-22 09:59:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829979300] [2020-12-22 09:59:15,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:15,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:15,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123600341] [2020-12-22 09:59:15,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:15,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:15,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:15,425 INFO L87 Difference]: Start difference. First operand 5527 states and 8056 transitions. Second operand 3 states. [2020-12-22 09:59:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:15,616 INFO L93 Difference]: Finished difference Result 7507 states and 10840 transitions. [2020-12-22 09:59:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:15,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:15,623 INFO L225 Difference]: With dead ends: 7507 [2020-12-22 09:59:15,623 INFO L226 Difference]: Without dead ends: 3553 [2020-12-22 09:59:15,627 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 09:59:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2020-12-22 09:59:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3551. [2020-12-22 09:59:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3551 states. [2020-12-22 09:59:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5248 transitions. [2020-12-22 09:59:15,825 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5248 transitions. Word has length 97 [2020-12-22 09:59:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:15,826 INFO L481 AbstractCegarLoop]: Abstraction has 3551 states and 5248 transitions. [2020-12-22 09:59:15,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5248 transitions. [2020-12-22 09:59:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:15,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:15,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:15,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:59:15,828 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:59:15,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:15,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175532157] [2020-12-22 09:59:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:16,193 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 09:59:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:16,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175532157] [2020-12-22 09:59:16,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63086186] [2020-12-22 09:59:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:59:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:17,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:17,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:59:17,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232507456] [2020-12-22 09:59:17,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:59:17,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:59:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:59:17,073 INFO L87 Difference]: Start difference. First operand 3551 states and 5248 transitions. Second operand 16 states. [2020-12-22 09:59:17,592 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:59:19,454 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:59:19,694 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:59:21,431 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:59:21,676 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:59:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:22,001 INFO L93 Difference]: Finished difference Result 14622 states and 20267 transitions. [2020-12-22 09:59:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:59:22,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:59:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:22,027 INFO L225 Difference]: With dead ends: 14622 [2020-12-22 09:59:22,027 INFO L226 Difference]: Without dead ends: 12644 [2020-12-22 09:59:22,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:59:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12644 states. [2020-12-22 09:59:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12644 to 9273. [2020-12-22 09:59:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9273 states. [2020-12-22 09:59:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9273 states to 9273 states and 12810 transitions. [2020-12-22 09:59:23,012 INFO L78 Accepts]: Start accepts. Automaton has 9273 states and 12810 transitions. Word has length 97 [2020-12-22 09:59:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:23,012 INFO L481 AbstractCegarLoop]: Abstraction has 9273 states and 12810 transitions. [2020-12-22 09:59:23,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:59:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 9273 states and 12810 transitions. [2020-12-22 09:59:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:23,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:23,016 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:59:23,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 09:59:23,232 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:59:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:23,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528705847] [2020-12-22 09:59:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:23,589 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:59:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:23,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528705847] [2020-12-22 09:59:23,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10564518] [2020-12-22 09:59:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:59:24,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:24,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:59:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:24,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:24,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:59:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671868773] [2020-12-22 09:59:24,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:59:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:59:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:59:24,798 INFO L87 Difference]: Start difference. First operand 9273 states and 12810 transitions. Second operand 22 states. [2020-12-22 09:59:24,941 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 09:59:25,190 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:59:25,597 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-12-22 09:59:27,872 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:59:28,132 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-12-22 09:59:28,315 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 09:59:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:30,612 INFO L93 Difference]: Finished difference Result 40074 states and 53876 transitions. [2020-12-22 09:59:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:59:30,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:59:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:30,667 INFO L225 Difference]: With dead ends: 40074 [2020-12-22 09:59:30,667 INFO L226 Difference]: Without dead ends: 33571 [2020-12-22 09:59:30,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:59:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33571 states. [2020-12-22 09:59:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33571 to 21776. [2020-12-22 09:59:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 09:59:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 29349 transitions. [2020-12-22 09:59:32,523 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 29349 transitions. Word has length 98 [2020-12-22 09:59:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:32,524 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 29349 transitions. [2020-12-22 09:59:32,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:59:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 29349 transitions. [2020-12-22 09:59:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:32,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:32,526 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:59:32,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:32,728 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:59:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:32,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918447454] [2020-12-22 09:59:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:33,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918447454] [2020-12-22 09:59:33,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279656085] [2020-12-22 09:59:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:59:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:33,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:59:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:34,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:34,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:59:34,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794003483] [2020-12-22 09:59:34,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:59:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:59:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:59:34,051 INFO L87 Difference]: Start difference. First operand 21776 states and 29349 transitions. Second operand 17 states. [2020-12-22 09:59:35,450 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:59:35,710 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-12-22 09:59:38,331 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:59:38,604 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-12-22 09:59:38,988 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:59:39,516 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 09:59:39,988 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:59:45,331 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:59:45,610 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 09:59:46,077 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-12-22 10:00:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:03,710 INFO L93 Difference]: Finished difference Result 216331 states and 287159 transitions. [2020-12-22 10:00:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 10:00:03,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 10:00:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:04,097 INFO L225 Difference]: With dead ends: 216331 [2020-12-22 10:00:04,097 INFO L226 Difference]: Without dead ends: 196774 [2020-12-22 10:00:04,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 10:00:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196774 states. [2020-12-22 10:00:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196774 to 112049. [2020-12-22 10:00:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112049 states. [2020-12-22 10:00:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112049 states to 112049 states and 146732 transitions. [2020-12-22 10:00:17,011 INFO L78 Accepts]: Start accepts. Automaton has 112049 states and 146732 transitions. Word has length 98 [2020-12-22 10:00:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:17,011 INFO L481 AbstractCegarLoop]: Abstraction has 112049 states and 146732 transitions. [2020-12-22 10:00:17,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:00:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 112049 states and 146732 transitions. [2020-12-22 10:00:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:00:17,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:17,015 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:00:17,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 10:00:17,216 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 10:00:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:17,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341583122] [2020-12-22 10:00:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:00:17,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341583122] [2020-12-22 10:00:17,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:17,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:17,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7165108] [2020-12-22 10:00:17,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:17,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:17,611 INFO L87 Difference]: Start difference. First operand 112049 states and 146732 transitions. Second operand 6 states. [2020-12-22 10:00:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:27,866 INFO L93 Difference]: Finished difference Result 212494 states and 278513 transitions. [2020-12-22 10:00:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:27,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:00:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:28,046 INFO L225 Difference]: With dead ends: 212494 [2020-12-22 10:00:28,046 INFO L226 Difference]: Without dead ends: 102190 [2020-12-22 10:00:28,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102190 states. [2020-12-22 10:00:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102190 to 102190. [2020-12-22 10:00:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102190 states. [2020-12-22 10:00:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102190 states to 102190 states and 132971 transitions. [2020-12-22 10:00:38,483 INFO L78 Accepts]: Start accepts. Automaton has 102190 states and 132971 transitions. Word has length 98 [2020-12-22 10:00:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:38,483 INFO L481 AbstractCegarLoop]: Abstraction has 102190 states and 132971 transitions. [2020-12-22 10:00:38,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 102190 states and 132971 transitions. [2020-12-22 10:00:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:00:38,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:38,487 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:00:38,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:00:38,488 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 10:00:38,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:38,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095292425] [2020-12-22 10:00:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 10:00:38,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095292425] [2020-12-22 10:00:38,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:38,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:38,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468067082] [2020-12-22 10:00:38,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:38,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:38,592 INFO L87 Difference]: Start difference. First operand 102190 states and 132971 transitions. Second operand 6 states. [2020-12-22 10:00:38,868 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-22 10:00:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:46,929 INFO L93 Difference]: Finished difference Result 175728 states and 228422 transitions. [2020-12-22 10:00:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:46,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:00:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:47,006 INFO L225 Difference]: With dead ends: 175728 [2020-12-22 10:00:47,006 INFO L226 Difference]: Without dead ends: 75449 [2020-12-22 10:00:47,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75449 states. [2020-12-22 10:00:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75449 to 75449. [2020-12-22 10:00:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75449 states. [2020-12-22 10:00:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75449 states to 75449 states and 96899 transitions. [2020-12-22 10:00:55,034 INFO L78 Accepts]: Start accepts. Automaton has 75449 states and 96899 transitions. Word has length 98 [2020-12-22 10:00:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:55,034 INFO L481 AbstractCegarLoop]: Abstraction has 75449 states and 96899 transitions. [2020-12-22 10:00:55,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 75449 states and 96899 transitions. [2020-12-22 10:00:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:00:55,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:55,038 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:00:55,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 10:00:55,039 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:55,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 10:00:55,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:55,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139600101] [2020-12-22 10:00:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 10:00:55,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139600101] [2020-12-22 10:00:55,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:55,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:55,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88432076] [2020-12-22 10:00:55,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:55,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:55,173 INFO L87 Difference]: Start difference. First operand 75449 states and 96899 transitions. Second operand 6 states. [2020-12-22 10:01:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:01,890 INFO L93 Difference]: Finished difference Result 131239 states and 168563 transitions. [2020-12-22 10:01:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:01:01,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:01:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:01,952 INFO L225 Difference]: With dead ends: 131239 [2020-12-22 10:01:01,953 INFO L226 Difference]: Without dead ends: 57419 [2020-12-22 10:01:01,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:01:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57419 states. [2020-12-22 10:01:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57419 to 57419. [2020-12-22 10:01:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57419 states. [2020-12-22 10:01:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57419 states to 57419 states and 73593 transitions. [2020-12-22 10:01:08,304 INFO L78 Accepts]: Start accepts. Automaton has 57419 states and 73593 transitions. Word has length 98 [2020-12-22 10:01:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:08,304 INFO L481 AbstractCegarLoop]: Abstraction has 57419 states and 73593 transitions. [2020-12-22 10:01:08,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 57419 states and 73593 transitions. [2020-12-22 10:01:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:01:08,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:08,307 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:01:08,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:01:08,308 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 10:01:08,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:08,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869089224] [2020-12-22 10:01:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:01:08,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869089224] [2020-12-22 10:01:08,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:08,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:01:08,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739982530] [2020-12-22 10:01:08,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:01:08,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:01:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:01:08,416 INFO L87 Difference]: Start difference. First operand 57419 states and 73593 transitions. Second operand 6 states. [2020-12-22 10:01:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:13,898 INFO L93 Difference]: Finished difference Result 100473 states and 128496 transitions. [2020-12-22 10:01:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:01:13,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 10:01:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:13,943 INFO L225 Difference]: With dead ends: 100473 [2020-12-22 10:01:13,943 INFO L226 Difference]: Without dead ends: 44685 [2020-12-22 10:01:13,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:01:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44685 states. [2020-12-22 10:01:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44685 to 44685. [2020-12-22 10:01:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44685 states. [2020-12-22 10:01:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44685 states to 44685 states and 56836 transitions. [2020-12-22 10:01:18,969 INFO L78 Accepts]: Start accepts. Automaton has 44685 states and 56836 transitions. Word has length 99 [2020-12-22 10:01:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:18,969 INFO L481 AbstractCegarLoop]: Abstraction has 44685 states and 56836 transitions. [2020-12-22 10:01:18,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44685 states and 56836 transitions. [2020-12-22 10:01:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 10:01:18,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:18,972 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:01:18,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:01:18,972 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 10:01:18,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:18,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172183109] [2020-12-22 10:01:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172183109] [2020-12-22 10:01:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236959208] [2020-12-22 10:01:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:01:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:19,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:01:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:01:20,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:01:20,501 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 10:01:21,176 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-22 10:01:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:21,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:01:21,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 10:01:21,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171240403] [2020-12-22 10:01:21,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:01:21,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:21,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:01:21,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:01:21,283 INFO L87 Difference]: Start difference. First operand 44685 states and 56836 transitions. Second operand 20 states. [2020-12-22 10:01:21,442 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-12-22 10:01:21,863 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 10:01:22,111 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-12-22 10:01:22,618 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 10:01:23,229 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 10:01:24,129 WARN L197 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 10:01:24,908 WARN L197 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 10:01:25,570 WARN L197 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:01:26,443 WARN L197 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:01:27,464 WARN L197 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:01:28,143 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 10:01:29,054 WARN L197 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:01:29,738 WARN L197 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 10:01:30,557 WARN L197 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:01:31,304 WARN L197 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:01:32,395 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:01:33,427 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:01:34,223 WARN L197 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:01:35,256 WARN L197 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:01:38,813 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:01:39,896 WARN L197 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:01:40,961 WARN L197 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:01:41,505 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:01:42,506 WARN L197 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:01:42,989 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:01:43,478 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:01:44,001 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:01:44,765 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:01:45,203 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:01:46,127 WARN L197 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:01:47,016 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:01:47,569 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:01:48,040 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:01:49,190 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:01:49,631 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:01:50,598 WARN L197 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:01:51,057 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:01:51,483 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:01:55,046 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:01:56,578 WARN L197 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:01:57,531 WARN L197 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:01:58,097 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:01:58,612 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:01:59,419 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:01:59,956 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:02:00,568 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:02:00,910 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:02:01,605 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:02:01,902 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:02:12,226 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:02:12,531 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 10:02:12,887 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 10:02:13,450 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:02:13,765 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 10:02:15,913 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:02:16,414 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:02:22,766 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 10:02:23,438 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 101