/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:11:50,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:11:50,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:11:50,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:11:50,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:11:50,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:11:50,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:11:50,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:11:50,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:11:50,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:11:50,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:11:50,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:11:50,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:11:50,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:11:50,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:11:50,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:11:50,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:11:50,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:11:50,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:11:50,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:11:50,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:11:50,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:11:50,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:11:50,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:11:50,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:11:50,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:11:50,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:11:50,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:11:50,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:11:50,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:11:50,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:11:50,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:11:50,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:11:50,865 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:11:50,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:11:50,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:11:50,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:11:50,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:11:50,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:11:50,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:11:50,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:11:50,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:11:50,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:11:50,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:11:50,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:11:50,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:11:50,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:11:50,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:11:50,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:11:50,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:11:50,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:11:50,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:11:50,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:11:50,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:11:50,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:11:51,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:11:51,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:11:51,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:11:51,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:11:51,336 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:11:51,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:11:51,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5c90c7b/d5ba81458e6f472383eacf0e2447f7be/FLAG2129d685a [2020-12-22 10:11:52,395 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:11:52,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:11:52,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5c90c7b/d5ba81458e6f472383eacf0e2447f7be/FLAG2129d685a [2020-12-22 10:11:52,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5c90c7b/d5ba81458e6f472383eacf0e2447f7be [2020-12-22 10:11:52,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:11:52,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:11:52,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:52,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:11:52,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:11:52,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:52" (1/1) ... [2020-12-22 10:11:52,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179e25b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:52, skipping insertion in model container [2020-12-22 10:11:52,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:52" (1/1) ... [2020-12-22 10:11:52,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:11:53,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:11:53,507 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[20609,20622] [2020-12-22 10:11:53,639 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[27427,27440] [2020-12-22 10:11:54,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:54,819 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:11:54,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[20609,20622] [2020-12-22 10:11:54,916 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[27427,27440] [2020-12-22 10:11:55,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:55,637 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:11:55,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55 WrapperNode [2020-12-22 10:11:55,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:55,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:55,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:11:55,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:11:55,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:55,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:56,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:11:56,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:11:56,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:11:56,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (1/1) ... [2020-12-22 10:11:56,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:11:56,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:11:56,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:11:56,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:11:56,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (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 10:11:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:11:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:11:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:11:57,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:04,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:04,201 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:04,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:04 BoogieIcfgContainer [2020-12-22 10:12:04,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:04,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:04,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:04,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:04,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:11:52" (1/3) ... [2020-12-22 10:12:04,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c22ead0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:04, skipping insertion in model container [2020-12-22 10:12:04,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:55" (2/3) ... [2020-12-22 10:12:04,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c22ead0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:04, skipping insertion in model container [2020-12-22 10:12:04,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:04" (3/3) ... [2020-12-22 10:12:04,220 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:12:04,227 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:04,234 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:04,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:04,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:04,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:04,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:04,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:04,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:04,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:04,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:04,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:12:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:04,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:04,343 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] [2020-12-22 10:12:04,344 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:12:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:04,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495066938] [2020-12-22 10:12:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:04,619 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 10:12:04,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495066938] [2020-12-22 10:12:04,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:04,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:04,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098044087] [2020-12-22 10:12:04,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:12:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:12:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:04,647 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:12:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:04,738 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:12:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:12:04,740 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:12:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:04,794 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:12:04,794 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:04,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:12:04,941 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:12:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:04,941 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:12:04,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:12:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:12:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:04,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:04,950 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] [2020-12-22 10:12:04,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:04,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:12:04,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:04,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427339703] [2020-12-22 10:12:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:05,148 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 10:12:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427339703] [2020-12-22 10:12:05,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905457647] [2020-12-22 10:12:05,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:05,154 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:12:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:05,501 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:12:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:05,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:05,519 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:12:05,519 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:05,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:12:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:12:05,576 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:12:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:05,576 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:12:05,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:12:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:12:05,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:05,581 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] [2020-12-22 10:12:05,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:05,581 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:05,587 INFO L82 PathProgramCache]: Analyzing trace with hash -313387553, now seen corresponding path program 1 times [2020-12-22 10:12:05,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:05,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134606731] [2020-12-22 10:12:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:05,852 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 10:12:05,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134606731] [2020-12-22 10:12:05,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:05,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746706736] [2020-12-22 10:12:05,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:05,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:05,860 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:12:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:15,320 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:12:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:15,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 10:12:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:15,335 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:12:15,336 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:12:15,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:12:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:12:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:12:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2980 transitions. [2020-12-22 10:12:15,398 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2980 transitions. Word has length 61 [2020-12-22 10:12:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,399 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2980 transitions. [2020-12-22 10:12:15,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2980 transitions. [2020-12-22 10:12:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:15,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:15,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:12:15,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:12:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609913981] [2020-12-22 10:12:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:15,553 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 10:12:15,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609913981] [2020-12-22 10:12:15,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:15,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:15,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555370433] [2020-12-22 10:12:15,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:15,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:15,556 INFO L87 Difference]: Start difference. First operand 1630 states and 2980 transitions. Second operand 3 states. [2020-12-22 10:12:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:15,620 INFO L93 Difference]: Finished difference Result 1762 states and 3190 transitions. [2020-12-22 10:12:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:15,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:15,633 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:12:15,634 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:12:15,635 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 10:12:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:12:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:12:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:12:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 3078 transitions. [2020-12-22 10:12:15,687 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 3078 transitions. Word has length 91 [2020-12-22 10:12:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,688 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 3078 transitions. [2020-12-22 10:12:15,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 3078 transitions. [2020-12-22 10:12:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:15,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:15,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:12:15,691 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:12:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128388557] [2020-12-22 10:12:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:15,790 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 10:12:15,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128388557] [2020-12-22 10:12:15,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:15,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:15,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673519255] [2020-12-22 10:12:15,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:15,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:15,793 INFO L87 Difference]: Start difference. First operand 1691 states and 3078 transitions. Second operand 3 states. [2020-12-22 10:12:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:15,874 INFO L93 Difference]: Finished difference Result 1939 states and 3474 transitions. [2020-12-22 10:12:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:15,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:15,888 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:12:15,889 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:12:15,890 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 10:12:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:12:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:12:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:12:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3263 transitions. [2020-12-22 10:12:15,947 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3263 transitions. Word has length 91 [2020-12-22 10:12:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,947 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 3263 transitions. [2020-12-22 10:12:15,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3263 transitions. [2020-12-22 10:12:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:15,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:15,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:12:15,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:12:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102620806] [2020-12-22 10:12:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:16,118 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 10:12:16,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102620806] [2020-12-22 10:12:16,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:16,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:16,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319822096] [2020-12-22 10:12:16,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:16,123 INFO L87 Difference]: Start difference. First operand 1807 states and 3263 transitions. Second operand 3 states. [2020-12-22 10:12:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:16,193 INFO L93 Difference]: Finished difference Result 2275 states and 4009 transitions. [2020-12-22 10:12:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:16,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:16,213 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:12:16,213 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:12:16,215 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 10:12:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:12:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:12:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:12:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3611 transitions. [2020-12-22 10:12:16,287 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3611 transitions. Word has length 91 [2020-12-22 10:12:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:16,288 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3611 transitions. [2020-12-22 10:12:16,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3611 transitions. [2020-12-22 10:12:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:16,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:16,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:16,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:12:16,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:12:16,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:16,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169810684] [2020-12-22 10:12:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:16,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169810684] [2020-12-22 10:12:16,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:16,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128872607] [2020-12-22 10:12:16,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:16,439 INFO L87 Difference]: Start difference. First operand 2027 states and 3611 transitions. Second operand 3 states. [2020-12-22 10:12:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:16,511 INFO L93 Difference]: Finished difference Result 2911 states and 5013 transitions. [2020-12-22 10:12:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:16,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:16,528 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:12:16,528 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:12:16,533 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 10:12:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:12:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:12:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:12:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 4263 transitions. [2020-12-22 10:12:16,627 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 4263 transitions. Word has length 91 [2020-12-22 10:12:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:16,627 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 4263 transitions. [2020-12-22 10:12:16,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 4263 transitions. [2020-12-22 10:12:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:16,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:16,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:16,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:12:16,631 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:12:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:16,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123828585] [2020-12-22 10:12:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:16,735 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 10:12:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123828585] [2020-12-22 10:12:16,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:16,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:16,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885650925] [2020-12-22 10:12:16,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:16,738 INFO L87 Difference]: Start difference. First operand 2443 states and 4263 transitions. Second operand 3 states. [2020-12-22 10:12:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:16,835 INFO L93 Difference]: Finished difference Result 4111 states and 6889 transitions. [2020-12-22 10:12:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:16,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:16,855 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:12:16,856 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:12:16,859 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 10:12:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:12:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:12:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:12:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5479 transitions. [2020-12-22 10:12:16,980 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5479 transitions. Word has length 91 [2020-12-22 10:12:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:16,981 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5479 transitions. [2020-12-22 10:12:16,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5479 transitions. [2020-12-22 10:12:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:16,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:16,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:16,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:12:16,983 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:16,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:16,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:12:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528756849] [2020-12-22 10:12:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:17,255 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 10:12:17,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528756849] [2020-12-22 10:12:17,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:17,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868550676] [2020-12-22 10:12:17,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:17,259 INFO L87 Difference]: Start difference. First operand 3227 states and 5479 transitions. Second operand 9 states. [2020-12-22 10:12:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:18,835 INFO L93 Difference]: Finished difference Result 26551 states and 42005 transitions. [2020-12-22 10:12:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:12:18,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:12:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:18,965 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:12:18,965 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:12:18,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:12:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:12:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:12:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:12:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 8023 transitions. [2020-12-22 10:12:19,615 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 8023 transitions. Word has length 91 [2020-12-22 10:12:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:19,619 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 8023 transitions. [2020-12-22 10:12:19,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 8023 transitions. [2020-12-22 10:12:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:19,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:19,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:19,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:12:19,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:12:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:19,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522123116] [2020-12-22 10:12:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:19,732 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 10:12:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522123116] [2020-12-22 10:12:19,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:19,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198699540] [2020-12-22 10:12:19,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:19,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:19,737 INFO L87 Difference]: Start difference. First operand 4891 states and 8023 transitions. Second operand 3 states. [2020-12-22 10:12:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:20,170 INFO L93 Difference]: Finished difference Result 11199 states and 17721 transitions. [2020-12-22 10:12:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:20,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:20,190 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:12:20,190 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:12:20,197 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 10:12:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:12:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:12:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:12:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 12343 transitions. [2020-12-22 10:12:20,658 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 12343 transitions. Word has length 93 [2020-12-22 10:12:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:20,659 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 12343 transitions. [2020-12-22 10:12:20,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 12343 transitions. [2020-12-22 10:12:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:20,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:20,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:20,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:12:20,661 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:12:20,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:20,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409595112] [2020-12-22 10:12:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:21,124 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 10:12:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409595112] [2020-12-22 10:12:21,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:21,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:21,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539454496] [2020-12-22 10:12:21,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:21,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:21,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:21,128 INFO L87 Difference]: Start difference. First operand 7803 states and 12343 transitions. Second operand 9 states. [2020-12-22 10:12:21,639 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 10:12:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:22,358 INFO L93 Difference]: Finished difference Result 14047 states and 21817 transitions. [2020-12-22 10:12:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:22,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:12:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:22,377 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:12:22,377 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:12:22,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:12:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:12:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:12:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:12:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 12279 transitions. [2020-12-22 10:12:22,826 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 12279 transitions. Word has length 93 [2020-12-22 10:12:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:22,826 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 12279 transitions. [2020-12-22 10:12:22,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 12279 transitions. [2020-12-22 10:12:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:22,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:22,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:22,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:12:22,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:12:22,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:22,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279148812] [2020-12-22 10:12:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:22,916 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 10:12:22,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279148812] [2020-12-22 10:12:22,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:22,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:22,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152021969] [2020-12-22 10:12:22,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:22,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:22,919 INFO L87 Difference]: Start difference. First operand 7803 states and 12279 transitions. Second operand 3 states. [2020-12-22 10:12:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:23,636 INFO L93 Difference]: Finished difference Result 19519 states and 29817 transitions. [2020-12-22 10:12:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:23,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:23,664 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:12:23,665 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:12:23,674 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 10:12:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:12:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:12:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:12:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 20279 transitions. [2020-12-22 10:12:24,496 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 20279 transitions. Word has length 93 [2020-12-22 10:12:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:24,497 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 20279 transitions. [2020-12-22 10:12:24,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 20279 transitions. [2020-12-22 10:12:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:24,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:24,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:24,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:12:24,499 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:12:24,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:24,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273508090] [2020-12-22 10:12:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:24,680 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 10:12:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273508090] [2020-12-22 10:12:24,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:24,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:12:24,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961592685] [2020-12-22 10:12:24,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:12:24,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:12:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:12:24,689 INFO L87 Difference]: Start difference. First operand 13275 states and 20279 transitions. Second operand 8 states. [2020-12-22 10:12:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:26,332 INFO L93 Difference]: Finished difference Result 22017 states and 33063 transitions. [2020-12-22 10:12:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:12:26,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:12:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:26,383 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:12:26,384 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:12:26,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:12:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:12:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:12:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20599 transitions. [2020-12-22 10:12:27,499 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20599 transitions. Word has length 94 [2020-12-22 10:12:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:27,499 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20599 transitions. [2020-12-22 10:12:27,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:12:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20599 transitions. [2020-12-22 10:12:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:12:27,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:27,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:27,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:12:27,502 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:12:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:27,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780737485] [2020-12-22 10:12:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:27,577 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 10:12:27,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780737485] [2020-12-22 10:12:27,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:27,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846271096] [2020-12-22 10:12:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:27,579 INFO L87 Difference]: Start difference. First operand 13659 states and 20599 transitions. Second operand 3 states. [2020-12-22 10:12:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:28,671 INFO L93 Difference]: Finished difference Result 25954 states and 38781 transitions. [2020-12-22 10:12:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:28,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:12:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:28,714 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:12:28,715 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:12:28,727 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 10:12:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:12:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:12:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:12:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28729 transitions. [2020-12-22 10:12:30,230 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28729 transitions. Word has length 95 [2020-12-22 10:12:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:30,230 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28729 transitions. [2020-12-22 10:12:30,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28729 transitions. [2020-12-22 10:12:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:30,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:30,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:30,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:12:30,243 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:12:30,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:30,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627940820] [2020-12-22 10:12:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:12:30,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627940820] [2020-12-22 10:12:30,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:30,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:30,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561840943] [2020-12-22 10:12:30,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:30,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:30,496 INFO L87 Difference]: Start difference. First operand 19293 states and 28729 transitions. Second operand 9 states. [2020-12-22 10:12:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:37,067 INFO L93 Difference]: Finished difference Result 146861 states and 214593 transitions. [2020-12-22 10:12:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:37,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:37,437 INFO L225 Difference]: With dead ends: 146861 [2020-12-22 10:12:37,437 INFO L226 Difference]: Without dead ends: 129131 [2020-12-22 10:12:37,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129131 states. [2020-12-22 10:12:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129131 to 37021. [2020-12-22 10:12:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37021 states. [2020-12-22 10:12:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37021 states to 37021 states and 54393 transitions. [2020-12-22 10:12:40,945 INFO L78 Accepts]: Start accepts. Automaton has 37021 states and 54393 transitions. Word has length 129 [2020-12-22 10:12:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:40,945 INFO L481 AbstractCegarLoop]: Abstraction has 37021 states and 54393 transitions. [2020-12-22 10:12:40,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37021 states and 54393 transitions. [2020-12-22 10:12:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:40,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:40,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:40,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:12:40,960 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:12:40,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:40,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130010188] [2020-12-22 10:12:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:12:41,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130010188] [2020-12-22 10:12:41,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:41,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:41,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331966795] [2020-12-22 10:12:41,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:41,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:41,195 INFO L87 Difference]: Start difference. First operand 37021 states and 54393 transitions. Second operand 9 states. [2020-12-22 10:12:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:48,828 INFO L93 Difference]: Finished difference Result 164589 states and 240257 transitions. [2020-12-22 10:12:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:48,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:49,220 INFO L225 Difference]: With dead ends: 164589 [2020-12-22 10:12:49,220 INFO L226 Difference]: Without dead ends: 146859 [2020-12-22 10:12:49,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146859 states. [2020-12-22 10:12:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146859 to 63645. [2020-12-22 10:12:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63645 states. [2020-12-22 10:12:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63645 states to 63645 states and 92729 transitions. [2020-12-22 10:12:54,210 INFO L78 Accepts]: Start accepts. Automaton has 63645 states and 92729 transitions. Word has length 129 [2020-12-22 10:12:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:54,211 INFO L481 AbstractCegarLoop]: Abstraction has 63645 states and 92729 transitions. [2020-12-22 10:12:54,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63645 states and 92729 transitions. [2020-12-22 10:12:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:54,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:54,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:54,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:12:54,230 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:12:54,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:54,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669662661] [2020-12-22 10:12:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:12:54,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669662661] [2020-12-22 10:12:54,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:54,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:54,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414065518] [2020-12-22 10:12:54,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:54,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:54,473 INFO L87 Difference]: Start difference. First operand 63645 states and 92729 transitions. Second operand 9 states. [2020-12-22 10:13:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:03,996 INFO L93 Difference]: Finished difference Result 182317 states and 265921 transitions. [2020-12-22 10:13:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:03,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:04,196 INFO L225 Difference]: With dead ends: 182317 [2020-12-22 10:13:04,197 INFO L226 Difference]: Without dead ends: 164587 [2020-12-22 10:13:04,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164587 states. [2020-12-22 10:13:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164587 to 81373. [2020-12-22 10:13:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81373 states. [2020-12-22 10:13:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81373 states to 81373 states and 118393 transitions. [2020-12-22 10:13:10,097 INFO L78 Accepts]: Start accepts. Automaton has 81373 states and 118393 transitions. Word has length 129 [2020-12-22 10:13:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:10,098 INFO L481 AbstractCegarLoop]: Abstraction has 81373 states and 118393 transitions. [2020-12-22 10:13:10,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 81373 states and 118393 transitions. [2020-12-22 10:13:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:10,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:10,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:10,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:13:10,116 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:13:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:10,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688451046] [2020-12-22 10:13:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688451046] [2020-12-22 10:13:10,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:10,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:10,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008033304] [2020-12-22 10:13:10,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:10,530 INFO L87 Difference]: Start difference. First operand 81373 states and 118393 transitions. Second operand 9 states. [2020-12-22 10:13:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:21,884 INFO L93 Difference]: Finished difference Result 200045 states and 291585 transitions. [2020-12-22 10:13:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:21,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:22,287 INFO L225 Difference]: With dead ends: 200045 [2020-12-22 10:13:22,287 INFO L226 Difference]: Without dead ends: 182315 [2020-12-22 10:13:22,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182315 states. [2020-12-22 10:13:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182315 to 99101. [2020-12-22 10:13:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99101 states. [2020-12-22 10:13:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99101 states to 99101 states and 144057 transitions. [2020-12-22 10:13:29,779 INFO L78 Accepts]: Start accepts. Automaton has 99101 states and 144057 transitions. Word has length 129 [2020-12-22 10:13:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:29,780 INFO L481 AbstractCegarLoop]: Abstraction has 99101 states and 144057 transitions. [2020-12-22 10:13:29,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 99101 states and 144057 transitions. [2020-12-22 10:13:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:29,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:29,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:29,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:13:29,797 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:13:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:29,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599673832] [2020-12-22 10:13:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:13:30,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599673832] [2020-12-22 10:13:30,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:30,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085623214] [2020-12-22 10:13:30,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:30,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:30,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:30,035 INFO L87 Difference]: Start difference. First operand 99101 states and 144057 transitions. Second operand 9 states. [2020-12-22 10:13:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:44,152 INFO L93 Difference]: Finished difference Result 217773 states and 317249 transitions. [2020-12-22 10:13:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:44,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:44,603 INFO L225 Difference]: With dead ends: 217773 [2020-12-22 10:13:44,603 INFO L226 Difference]: Without dead ends: 200043 [2020-12-22 10:13:44,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200043 states. [2020-12-22 10:13:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200043 to 116829. [2020-12-22 10:13:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116829 states. [2020-12-22 10:13:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116829 states to 116829 states and 169721 transitions. [2020-12-22 10:13:54,003 INFO L78 Accepts]: Start accepts. Automaton has 116829 states and 169721 transitions. Word has length 129 [2020-12-22 10:13:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:54,003 INFO L481 AbstractCegarLoop]: Abstraction has 116829 states and 169721 transitions. [2020-12-22 10:13:54,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 116829 states and 169721 transitions. [2020-12-22 10:13:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:54,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:54,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:13:54,236 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:13:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:54,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632224297] [2020-12-22 10:13:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:13:54,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632224297] [2020-12-22 10:13:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540014342] [2020-12-22 10:13:54,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:54,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:54,527 INFO L87 Difference]: Start difference. First operand 116829 states and 169721 transitions. Second operand 9 states. [2020-12-22 10:14:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:11,496 INFO L93 Difference]: Finished difference Result 235501 states and 342913 transitions. [2020-12-22 10:14:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:11,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:14:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:11,797 INFO L225 Difference]: With dead ends: 235501 [2020-12-22 10:14:11,797 INFO L226 Difference]: Without dead ends: 217771 [2020-12-22 10:14:11,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217771 states. [2020-12-22 10:14:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217771 to 134557. [2020-12-22 10:14:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134557 states. [2020-12-22 10:14:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134557 states to 134557 states and 195385 transitions. [2020-12-22 10:14:23,573 INFO L78 Accepts]: Start accepts. Automaton has 134557 states and 195385 transitions. Word has length 129 [2020-12-22 10:14:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:23,574 INFO L481 AbstractCegarLoop]: Abstraction has 134557 states and 195385 transitions. [2020-12-22 10:14:23,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:23,574 INFO L276 IsEmpty]: Start isEmpty. Operand 134557 states and 195385 transitions. [2020-12-22 10:14:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:14:23,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:23,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:23,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:23,593 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:14:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:23,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330591698] [2020-12-22 10:14:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:23,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330591698] [2020-12-22 10:14:23,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:23,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424234957] [2020-12-22 10:14:23,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:23,923 INFO L87 Difference]: Start difference. First operand 134557 states and 195385 transitions. Second operand 3 states. [2020-12-22 10:14:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:31,785 INFO L93 Difference]: Finished difference Result 226758 states and 329832 transitions. [2020-12-22 10:14:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:31,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:14:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:31,888 INFO L225 Difference]: With dead ends: 226758 [2020-12-22 10:14:31,888 INFO L226 Difference]: Without dead ends: 93764 [2020-12-22 10:14:31,938 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 10:14:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93764 states. [2020-12-22 10:14:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93764 to 93762. [2020-12-22 10:14:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93762 states. [2020-12-22 10:14:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93762 states to 93762 states and 136357 transitions. [2020-12-22 10:14:39,720 INFO L78 Accepts]: Start accepts. Automaton has 93762 states and 136357 transitions. Word has length 131 [2020-12-22 10:14:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:39,720 INFO L481 AbstractCegarLoop]: Abstraction has 93762 states and 136357 transitions. [2020-12-22 10:14:39,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 93762 states and 136357 transitions. [2020-12-22 10:14:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:14:39,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:39,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:39,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:14:39,732 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:14:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:39,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691123217] [2020-12-22 10:14:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:14:40,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691123217] [2020-12-22 10:14:40,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:40,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:40,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915142172] [2020-12-22 10:14:40,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:40,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:40,095 INFO L87 Difference]: Start difference. First operand 93762 states and 136357 transitions. Second operand 9 states. [2020-12-22 10:14:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:55,029 INFO L93 Difference]: Finished difference Result 179794 states and 261805 transitions. [2020-12-22 10:14:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:55,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:14:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:55,249 INFO L225 Difference]: With dead ends: 179794 [2020-12-22 10:14:55,249 INFO L226 Difference]: Without dead ends: 167504 [2020-12-22 10:14:55,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167504 states.