/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:00:41,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:00:41,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:00:41,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:00:41,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:00:41,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:00:41,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:00:41,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:00:41,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:00:41,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:00:41,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:00:41,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:00:41,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:00:41,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:00:41,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:00:41,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:00:41,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:00:41,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:00:41,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:00:41,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:00:41,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:00:41,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:00:41,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:00:41,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:00:41,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:00:41,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:00:41,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:00:41,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:00:41,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:00:41,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:00:41,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:00:41,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:00:41,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:00:41,761 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:00:41,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:00:41,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:00:41,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:00:41,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:00:41,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:00:41,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:00:41,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:00:41,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:00:41,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:00:41,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:00:41,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:00:41,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:00:41,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:00:41,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:00:41,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:00:41,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:00:41,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:00:41,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:00:41,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:00:41,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:00:41,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:00:42,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:00:42,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:00:42,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:00:42,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:00:42,176 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:00:42,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:00:42,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f2af44b7/56aa7047ce9145b193656de76d0b9b15/FLAG142cb5463 [2020-12-22 09:00:42,997 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:00:42,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:00:43,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f2af44b7/56aa7047ce9145b193656de76d0b9b15/FLAG142cb5463 [2020-12-22 09:00:43,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f2af44b7/56aa7047ce9145b193656de76d0b9b15 [2020-12-22 09:00:43,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:00:43,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:00:43,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:43,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:00:43,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:00:43,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:43,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294420fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43, skipping insertion in model container [2020-12-22 09:00:43,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:43,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:00:43,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:00:43,621 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7234,7247] [2020-12-22 09:00:43,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:43,710 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:00:43,823 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7234,7247] [2020-12-22 09:00:43,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:43,875 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:00:43,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43 WrapperNode [2020-12-22 09:00:43,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:43,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:43,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:00:43,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:00:43,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:43,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:43,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:43,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:00:43,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:00:43,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:00:43,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:43,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (1/1) ... [2020-12-22 09:00:44,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:00:44,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:00:44,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:00:44,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:00:44,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (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 09:00:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:00:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:00:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:00:44,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:00:45,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:00:45,066 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:00:45,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:45 BoogieIcfgContainer [2020-12-22 09:00:45,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:00:45,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:00:45,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:00:45,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:00:45,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:00:43" (1/3) ... [2020-12-22 09:00:45,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63cf982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:45, skipping insertion in model container [2020-12-22 09:00:45,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:43" (2/3) ... [2020-12-22 09:00:45,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63cf982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:45, skipping insertion in model container [2020-12-22 09:00:45,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:45" (3/3) ... [2020-12-22 09:00:45,077 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:00:45,084 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:00:45,089 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:00:45,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:00:45,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:00:45,147 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:00:45,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:00:45,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:00:45,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:00:45,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:00:45,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:00:45,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:00:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-12-22 09:00:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:00:45,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:45,177 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] [2020-12-22 09:00:45,177 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash -463597657, now seen corresponding path program 1 times [2020-12-22 09:00:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:45,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543003782] [2020-12-22 09:00:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:45,709 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 09:00:45,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543003782] [2020-12-22 09:00:45,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:45,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:45,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604037195] [2020-12-22 09:00:45,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:45,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:45,734 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 3 states. [2020-12-22 09:00:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:45,863 INFO L93 Difference]: Finished difference Result 317 states and 535 transitions. [2020-12-22 09:00:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:45,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:00:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:45,881 INFO L225 Difference]: With dead ends: 317 [2020-12-22 09:00:45,881 INFO L226 Difference]: Without dead ends: 219 [2020-12-22 09:00:45,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-22 09:00:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-12-22 09:00:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 09:00:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 343 transitions. [2020-12-22 09:00:45,952 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 343 transitions. Word has length 56 [2020-12-22 09:00:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:45,953 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 343 transitions. [2020-12-22 09:00:45,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 343 transitions. [2020-12-22 09:00:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 09:00:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:45,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:00:45,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:00:45,958 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash -452034936, now seen corresponding path program 1 times [2020-12-22 09:00:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:45,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533376698] [2020-12-22 09:00:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:46,182 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 09:00:46,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533376698] [2020-12-22 09:00:46,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:46,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178141263] [2020-12-22 09:00:46,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:46,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:46,188 INFO L87 Difference]: Start difference. First operand 217 states and 343 transitions. Second operand 3 states. [2020-12-22 09:00:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:46,274 INFO L93 Difference]: Finished difference Result 533 states and 863 transitions. [2020-12-22 09:00:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:46,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 09:00:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:46,280 INFO L225 Difference]: With dead ends: 533 [2020-12-22 09:00:46,280 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 09:00:46,282 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 09:00:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 09:00:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2020-12-22 09:00:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-12-22 09:00:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 586 transitions. [2020-12-22 09:00:46,348 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 586 transitions. Word has length 58 [2020-12-22 09:00:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:46,351 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 586 transitions. [2020-12-22 09:00:46,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 586 transitions. [2020-12-22 09:00:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:00:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:46,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:00:46,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:00:46,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1416370665, now seen corresponding path program 1 times [2020-12-22 09:00:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:46,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799322147] [2020-12-22 09:00:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:46,520 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 09:00:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799322147] [2020-12-22 09:00:46,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:46,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:46,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370853323] [2020-12-22 09:00:46,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:46,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:46,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:46,523 INFO L87 Difference]: Start difference. First operand 365 states and 586 transitions. Second operand 3 states. [2020-12-22 09:00:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:46,610 INFO L93 Difference]: Finished difference Result 961 states and 1564 transitions. [2020-12-22 09:00:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:46,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 09:00:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:46,618 INFO L225 Difference]: With dead ends: 961 [2020-12-22 09:00:46,619 INFO L226 Difference]: Without dead ends: 647 [2020-12-22 09:00:46,625 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 09:00:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-12-22 09:00:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2020-12-22 09:00:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-12-22 09:00:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2020-12-22 09:00:46,705 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 60 [2020-12-22 09:00:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:46,706 INFO L481 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2020-12-22 09:00:46,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2020-12-22 09:00:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:00:46,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:46,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:00:46,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:00:46,710 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2105142966, now seen corresponding path program 1 times [2020-12-22 09:00:46,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:46,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258824583] [2020-12-22 09:00:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:46,893 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 09:00:46,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258824583] [2020-12-22 09:00:46,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:46,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:46,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508231654] [2020-12-22 09:00:46,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:46,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:46,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:46,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:46,897 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand 5 states. [2020-12-22 09:00:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:47,191 INFO L93 Difference]: Finished difference Result 2801 states and 4612 transitions. [2020-12-22 09:00:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:00:47,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 09:00:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:47,204 INFO L225 Difference]: With dead ends: 2801 [2020-12-22 09:00:47,205 INFO L226 Difference]: Without dead ends: 2207 [2020-12-22 09:00:47,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:00:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-12-22 09:00:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1164. [2020-12-22 09:00:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1164 states. [2020-12-22 09:00:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1892 transitions. [2020-12-22 09:00:47,308 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1892 transitions. Word has length 62 [2020-12-22 09:00:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:47,308 INFO L481 AbstractCegarLoop]: Abstraction has 1164 states and 1892 transitions. [2020-12-22 09:00:47,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1892 transitions. [2020-12-22 09:00:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:00:47,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:47,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:00:47,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:00:47,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash -897426710, now seen corresponding path program 1 times [2020-12-22 09:00:47,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:47,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625551692] [2020-12-22 09:00:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:47,407 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 09:00:47,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625551692] [2020-12-22 09:00:47,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:47,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:47,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280748598] [2020-12-22 09:00:47,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:00:47,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:00:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:00:47,410 INFO L87 Difference]: Start difference. First operand 1164 states and 1892 transitions. Second operand 4 states. [2020-12-22 09:00:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:47,622 INFO L93 Difference]: Finished difference Result 3403 states and 5593 transitions. [2020-12-22 09:00:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:00:47,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:00:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:47,635 INFO L225 Difference]: With dead ends: 3403 [2020-12-22 09:00:47,636 INFO L226 Difference]: Without dead ends: 2290 [2020-12-22 09:00:47,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2020-12-22 09:00:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1718. [2020-12-22 09:00:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 09:00:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2802 transitions. [2020-12-22 09:00:47,763 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2802 transitions. Word has length 63 [2020-12-22 09:00:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2802 transitions. [2020-12-22 09:00:47,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:00:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2802 transitions. [2020-12-22 09:00:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:00:47,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:47,767 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 09:00:47,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:00:47,767 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash -384729531, now seen corresponding path program 1 times [2020-12-22 09:00:47,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:47,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99771989] [2020-12-22 09:00:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:47,851 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 09:00:47,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99771989] [2020-12-22 09:00:47,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:47,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363700436] [2020-12-22 09:00:47,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:47,854 INFO L87 Difference]: Start difference. First operand 1718 states and 2802 transitions. Second operand 3 states. [2020-12-22 09:00:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:48,040 INFO L93 Difference]: Finished difference Result 3773 states and 6212 transitions. [2020-12-22 09:00:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:48,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:00:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:48,054 INFO L225 Difference]: With dead ends: 3773 [2020-12-22 09:00:48,054 INFO L226 Difference]: Without dead ends: 2585 [2020-12-22 09:00:48,057 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 09:00:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-12-22 09:00:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2583. [2020-12-22 09:00:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2020-12-22 09:00:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4221 transitions. [2020-12-22 09:00:48,211 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4221 transitions. Word has length 64 [2020-12-22 09:00:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:48,211 INFO L481 AbstractCegarLoop]: Abstraction has 2583 states and 4221 transitions. [2020-12-22 09:00:48,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4221 transitions. [2020-12-22 09:00:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:00:48,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:48,213 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 09:00:48,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:00:48,214 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1071619613, now seen corresponding path program 1 times [2020-12-22 09:00:48,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:48,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501938555] [2020-12-22 09:00:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:48,269 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 09:00:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501938555] [2020-12-22 09:00:48,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:48,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457147235] [2020-12-22 09:00:48,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:48,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:48,272 INFO L87 Difference]: Start difference. First operand 2583 states and 4221 transitions. Second operand 3 states. [2020-12-22 09:00:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:48,495 INFO L93 Difference]: Finished difference Result 5027 states and 8240 transitions. [2020-12-22 09:00:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:48,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:00:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:48,516 INFO L225 Difference]: With dead ends: 5027 [2020-12-22 09:00:48,516 INFO L226 Difference]: Without dead ends: 3593 [2020-12-22 09:00:48,521 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 09:00:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2020-12-22 09:00:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3591. [2020-12-22 09:00:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3591 states. [2020-12-22 09:00:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 5851 transitions. [2020-12-22 09:00:48,739 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 5851 transitions. Word has length 64 [2020-12-22 09:00:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:48,739 INFO L481 AbstractCegarLoop]: Abstraction has 3591 states and 5851 transitions. [2020-12-22 09:00:48,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 5851 transitions. [2020-12-22 09:00:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:00:48,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:48,740 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 09:00:48,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:00:48,741 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2108370415, now seen corresponding path program 1 times [2020-12-22 09:00:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:48,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321362092] [2020-12-22 09:00:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:48,829 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 09:00:48,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321362092] [2020-12-22 09:00:48,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:48,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:48,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177652205] [2020-12-22 09:00:48,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:00:48,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:00:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:00:48,832 INFO L87 Difference]: Start difference. First operand 3591 states and 5851 transitions. Second operand 4 states. [2020-12-22 09:00:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:49,354 INFO L93 Difference]: Finished difference Result 11631 states and 19011 transitions. [2020-12-22 09:00:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:00:49,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 09:00:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:49,397 INFO L225 Difference]: With dead ends: 11631 [2020-12-22 09:00:49,398 INFO L226 Difference]: Without dead ends: 8109 [2020-12-22 09:00:49,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:00:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8109 states. [2020-12-22 09:00:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8109 to 5664. [2020-12-22 09:00:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5664 states. [2020-12-22 09:00:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 9196 transitions. [2020-12-22 09:00:49,902 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 9196 transitions. Word has length 64 [2020-12-22 09:00:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:49,903 INFO L481 AbstractCegarLoop]: Abstraction has 5664 states and 9196 transitions. [2020-12-22 09:00:49,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:00:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 9196 transitions. [2020-12-22 09:00:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:00:49,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:49,904 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] [2020-12-22 09:00:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:00:49,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2012593663, now seen corresponding path program 1 times [2020-12-22 09:00:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:49,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338723782] [2020-12-22 09:00:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:49,978 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 09:00:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338723782] [2020-12-22 09:00:49,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:49,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:49,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303050433] [2020-12-22 09:00:49,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:49,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:49,991 INFO L87 Difference]: Start difference. First operand 5664 states and 9196 transitions. Second operand 3 states. [2020-12-22 09:00:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:50,455 INFO L93 Difference]: Finished difference Result 11084 states and 18033 transitions. [2020-12-22 09:00:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:50,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:00:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:50,492 INFO L225 Difference]: With dead ends: 11084 [2020-12-22 09:00:50,492 INFO L226 Difference]: Without dead ends: 7832 [2020-12-22 09:00:50,499 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 09:00:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2020-12-22 09:00:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7830. [2020-12-22 09:00:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7830 states. [2020-12-22 09:00:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 12650 transitions. [2020-12-22 09:00:51,008 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 12650 transitions. Word has length 64 [2020-12-22 09:00:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:51,009 INFO L481 AbstractCegarLoop]: Abstraction has 7830 states and 12650 transitions. [2020-12-22 09:00:51,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 12650 transitions. [2020-12-22 09:00:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:00:51,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:51,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:00:51,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:00:51,011 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash -988361583, now seen corresponding path program 1 times [2020-12-22 09:00:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:51,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715316313] [2020-12-22 09:00:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:51,070 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 09:00:51,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715316313] [2020-12-22 09:00:51,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:51,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:51,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109549703] [2020-12-22 09:00:51,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:00:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:00:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:00:51,073 INFO L87 Difference]: Start difference. First operand 7830 states and 12650 transitions. Second operand 4 states. [2020-12-22 09:00:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:52,063 INFO L93 Difference]: Finished difference Result 24459 states and 39607 transitions. [2020-12-22 09:00:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:00:52,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 09:00:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:52,117 INFO L225 Difference]: With dead ends: 24459 [2020-12-22 09:00:52,117 INFO L226 Difference]: Without dead ends: 16714 [2020-12-22 09:00:52,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2020-12-22 09:00:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 12229. [2020-12-22 09:00:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12229 states. [2020-12-22 09:00:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 19657 transitions. [2020-12-22 09:00:52,876 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 19657 transitions. Word has length 65 [2020-12-22 09:00:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:52,876 INFO L481 AbstractCegarLoop]: Abstraction has 12229 states and 19657 transitions. [2020-12-22 09:00:52,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:00:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 19657 transitions. [2020-12-22 09:00:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:00:52,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:52,878 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 09:00:52,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:00:52,878 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2145020638, now seen corresponding path program 1 times [2020-12-22 09:00:52,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:52,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633857493] [2020-12-22 09:00:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:53,003 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 09:00:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633857493] [2020-12-22 09:00:53,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:53,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:53,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476065731] [2020-12-22 09:00:53,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:00:53,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:00:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:00:53,008 INFO L87 Difference]: Start difference. First operand 12229 states and 19657 transitions. Second operand 4 states. [2020-12-22 09:00:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:54,665 INFO L93 Difference]: Finished difference Result 35916 states and 57700 transitions. [2020-12-22 09:00:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:00:54,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:00:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:54,731 INFO L225 Difference]: With dead ends: 35916 [2020-12-22 09:00:54,731 INFO L226 Difference]: Without dead ends: 23696 [2020-12-22 09:00:54,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23696 states. [2020-12-22 09:00:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23696 to 23694. [2020-12-22 09:00:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23694 states. [2020-12-22 09:00:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23694 states to 23694 states and 37831 transitions. [2020-12-22 09:00:55,937 INFO L78 Accepts]: Start accepts. Automaton has 23694 states and 37831 transitions. Word has length 67 [2020-12-22 09:00:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:55,937 INFO L481 AbstractCegarLoop]: Abstraction has 23694 states and 37831 transitions. [2020-12-22 09:00:55,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:00:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23694 states and 37831 transitions. [2020-12-22 09:00:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:00:55,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:55,939 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 09:00:55,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:00:55,939 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1021957618, now seen corresponding path program 1 times [2020-12-22 09:00:55,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:55,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334650384] [2020-12-22 09:00:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:55,973 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 09:00:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334650384] [2020-12-22 09:00:55,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:55,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:55,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394964501] [2020-12-22 09:00:55,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:55,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:55,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:55,976 INFO L87 Difference]: Start difference. First operand 23694 states and 37831 transitions. Second operand 3 states. [2020-12-22 09:00:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:58,154 INFO L93 Difference]: Finished difference Result 71044 states and 113431 transitions. [2020-12-22 09:00:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:58,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:00:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:58,275 INFO L225 Difference]: With dead ends: 71044 [2020-12-22 09:00:58,275 INFO L226 Difference]: Without dead ends: 47378 [2020-12-22 09:00:58,315 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 09:00:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47378 states. [2020-12-22 09:00:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47378 to 23696. [2020-12-22 09:00:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23696 states. [2020-12-22 09:00:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23696 states to 23696 states and 37833 transitions. [2020-12-22 09:00:59,997 INFO L78 Accepts]: Start accepts. Automaton has 23696 states and 37833 transitions. Word has length 68 [2020-12-22 09:00:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:59,997 INFO L481 AbstractCegarLoop]: Abstraction has 23696 states and 37833 transitions. [2020-12-22 09:00:59,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 23696 states and 37833 transitions. [2020-12-22 09:00:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:00:59,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:59,998 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 09:00:59,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:00:59,999 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1728755127, now seen corresponding path program 1 times [2020-12-22 09:00:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:59,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612111932] [2020-12-22 09:01:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:00,050 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 09:01:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612111932] [2020-12-22 09:01:00,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:00,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552589456] [2020-12-22 09:01:00,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:00,052 INFO L87 Difference]: Start difference. First operand 23696 states and 37833 transitions. Second operand 3 states. [2020-12-22 09:01:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:01,873 INFO L93 Difference]: Finished difference Result 57113 states and 91704 transitions. [2020-12-22 09:01:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:01,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:01:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:01,926 INFO L225 Difference]: With dead ends: 57113 [2020-12-22 09:01:01,927 INFO L226 Difference]: Without dead ends: 33534 [2020-12-22 09:01:01,952 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 09:01:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33534 states. [2020-12-22 09:01:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33534 to 32622. [2020-12-22 09:01:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32622 states. [2020-12-22 09:01:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32622 states to 32622 states and 51988 transitions. [2020-12-22 09:01:03,977 INFO L78 Accepts]: Start accepts. Automaton has 32622 states and 51988 transitions. Word has length 68 [2020-12-22 09:01:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:03,977 INFO L481 AbstractCegarLoop]: Abstraction has 32622 states and 51988 transitions. [2020-12-22 09:01:03,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32622 states and 51988 transitions. [2020-12-22 09:01:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:03,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:03,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:03,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:01:03,979 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:03,979 INFO L82 PathProgramCache]: Analyzing trace with hash -465348076, now seen corresponding path program 1 times [2020-12-22 09:01:03,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:03,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586984519] [2020-12-22 09:01:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:04,049 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 09:01:04,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586984519] [2020-12-22 09:01:04,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:04,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:04,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639723977] [2020-12-22 09:01:04,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:04,052 INFO L87 Difference]: Start difference. First operand 32622 states and 51988 transitions. Second operand 3 states. [2020-12-22 09:01:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:07,306 INFO L93 Difference]: Finished difference Result 95579 states and 152246 transitions. [2020-12-22 09:01:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:07,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 09:01:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:07,403 INFO L225 Difference]: With dead ends: 95579 [2020-12-22 09:01:07,403 INFO L226 Difference]: Without dead ends: 63118 [2020-12-22 09:01:07,436 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 09:01:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63118 states. [2020-12-22 09:01:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63118 to 63116. [2020-12-22 09:01:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63116 states. [2020-12-22 09:01:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63116 states to 63116 states and 99845 transitions. [2020-12-22 09:01:11,065 INFO L78 Accepts]: Start accepts. Automaton has 63116 states and 99845 transitions. Word has length 69 [2020-12-22 09:01:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:11,066 INFO L481 AbstractCegarLoop]: Abstraction has 63116 states and 99845 transitions. [2020-12-22 09:01:11,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 63116 states and 99845 transitions. [2020-12-22 09:01:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:11,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:11,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:11,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:01:11,067 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash -847134185, now seen corresponding path program 1 times [2020-12-22 09:01:11,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:11,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721761610] [2020-12-22 09:01:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:11,174 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 09:01:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721761610] [2020-12-22 09:01:11,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:11,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:01:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229854542] [2020-12-22 09:01:11,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:01:11,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:01:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:11,177 INFO L87 Difference]: Start difference. First operand 63116 states and 99845 transitions. Second operand 5 states. [2020-12-22 09:01:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:18,297 INFO L93 Difference]: Finished difference Result 177390 states and 280482 transitions. [2020-12-22 09:01:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:18,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 09:01:18,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:18,491 INFO L225 Difference]: With dead ends: 177390 [2020-12-22 09:01:18,491 INFO L226 Difference]: Without dead ends: 114288 [2020-12-22 09:01:18,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114288 states. [2020-12-22 09:01:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114288 to 114286. [2020-12-22 09:01:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114286 states. [2020-12-22 09:01:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114286 states to 114286 states and 179243 transitions. [2020-12-22 09:01:25,669 INFO L78 Accepts]: Start accepts. Automaton has 114286 states and 179243 transitions. Word has length 69 [2020-12-22 09:01:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:25,669 INFO L481 AbstractCegarLoop]: Abstraction has 114286 states and 179243 transitions. [2020-12-22 09:01:25,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:01:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 114286 states and 179243 transitions. [2020-12-22 09:01:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:25,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:25,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:01:25,671 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2070551233, now seen corresponding path program 1 times [2020-12-22 09:01:25,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611709490] [2020-12-22 09:01:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:25,761 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 09:01:25,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611709490] [2020-12-22 09:01:25,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:25,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:25,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643299530] [2020-12-22 09:01:25,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:25,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:25,763 INFO L87 Difference]: Start difference. First operand 114286 states and 179243 transitions. Second operand 4 states. [2020-12-22 09:01:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:39,448 INFO L93 Difference]: Finished difference Result 335103 states and 525032 transitions. [2020-12-22 09:01:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:39,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:01:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:40,024 INFO L225 Difference]: With dead ends: 335103 [2020-12-22 09:01:40,024 INFO L226 Difference]: Without dead ends: 220873 [2020-12-22 09:01:40,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220873 states. [2020-12-22 09:01:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220873 to 220871. [2020-12-22 09:01:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220871 states. [2020-12-22 09:01:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220871 states to 220871 states and 343753 transitions. [2020-12-22 09:01:54,338 INFO L78 Accepts]: Start accepts. Automaton has 220871 states and 343753 transitions. Word has length 69 [2020-12-22 09:01:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:54,339 INFO L481 AbstractCegarLoop]: Abstraction has 220871 states and 343753 transitions. [2020-12-22 09:01:54,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 220871 states and 343753 transitions. [2020-12-22 09:01:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:54,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:54,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:01:54,344 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1773136819, now seen corresponding path program 1 times [2020-12-22 09:01:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:54,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570402360] [2020-12-22 09:01:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:54,398 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 09:01:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570402360] [2020-12-22 09:01:54,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:54,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:54,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894306498] [2020-12-22 09:01:54,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:54,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:54,402 INFO L87 Difference]: Start difference. First operand 220871 states and 343753 transitions. Second operand 3 states. [2020-12-22 09:02:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:21,321 INFO L93 Difference]: Finished difference Result 662461 states and 1031026 transitions. [2020-12-22 09:02:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:21,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:02:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:22,427 INFO L225 Difference]: With dead ends: 662461 [2020-12-22 09:02:22,427 INFO L226 Difference]: Without dead ends: 441681 [2020-12-22 09:02:22,663 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 09:02:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441681 states. [2020-12-22 09:02:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441681 to 220881. [2020-12-22 09:02:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220881 states. [2020-12-22 09:02:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220881 states to 220881 states and 343763 transitions. [2020-12-22 09:02:40,135 INFO L78 Accepts]: Start accepts. Automaton has 220881 states and 343763 transitions. Word has length 70 [2020-12-22 09:02:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:40,136 INFO L481 AbstractCegarLoop]: Abstraction has 220881 states and 343763 transitions. [2020-12-22 09:02:40,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 220881 states and 343763 transitions. [2020-12-22 09:02:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:02:40,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:40,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:40,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:02:40,139 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2018513194, now seen corresponding path program 1 times [2020-12-22 09:02:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:40,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049271962] [2020-12-22 09:02:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:40,198 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 09:02:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049271962] [2020-12-22 09:02:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551345678] [2020-12-22 09:02:40,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:40,204 INFO L87 Difference]: Start difference. First operand 220881 states and 343763 transitions. Second operand 3 states.