/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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:25:59,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:25:59,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:25:59,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:25:59,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:25:59,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:25:59,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:25:59,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:25:59,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:25:59,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:25:59,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:25:59,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:25:59,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:25:59,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:25:59,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:25:59,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:25:59,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:25:59,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:25:59,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:25:59,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:25:59,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:25:59,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:25:59,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:25:59,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:25:59,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:25:59,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:25:59,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:25:59,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:25:59,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:25:59,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:25:59,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:25:59,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:25:59,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:25:59,923 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:25:59,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:25:59,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:25:59,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:25:59,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:25:59,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:25:59,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:25:59,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:25:59,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:25:59,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:25:59,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:25:59,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:25:59,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:25:59,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:25:59,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:25:59,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:25:59,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:25:59,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:25:59,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:25:59,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:25:59,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:25:59,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:26:00,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:26:00,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:26:00,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:26:00,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:26:00,392 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:26:00,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:26:00,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a1e74c4/623f7025451048e98e14324b40183f76/FLAG1948f3be1 [2020-12-22 10:26:01,433 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:26:01,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:26:01,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a1e74c4/623f7025451048e98e14324b40183f76/FLAG1948f3be1 [2020-12-22 10:26:01,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a1e74c4/623f7025451048e98e14324b40183f76 [2020-12-22 10:26:01,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:26:01,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:26:01,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:01,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:26:01,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:26:01,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:01" (1/1) ... [2020-12-22 10:26:01,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4637ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:01, skipping insertion in model container [2020-12-22 10:26:01,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:01" (1/1) ... [2020-12-22 10:26:01,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:26:02,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:26:02,725 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[26949,26962] [2020-12-22 10:26:02,779 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[32261,32274] [2020-12-22 10:26:03,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:03,866 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:26:03,955 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[26949,26962] [2020-12-22 10:26:03,971 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[32261,32274] [2020-12-22 10:26:04,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:04,659 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:26:04,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04 WrapperNode [2020-12-22 10:26:04,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:04,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:04,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:26:04,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:26:04,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:04,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:05,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:26:05,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:26:05,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:26:05,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (1/1) ... [2020-12-22 10:26:05,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:26:05,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:26:05,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:26:05,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:26:05,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (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 10:26:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:26:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:26:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:26:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:26:11,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:26:11,584 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:26:11,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:11 BoogieIcfgContainer [2020-12-22 10:26:11,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:26:11,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:26:11,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:26:11,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:26:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:26:01" (1/3) ... [2020-12-22 10:26:11,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdf31ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:11, skipping insertion in model container [2020-12-22 10:26:11,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:04" (2/3) ... [2020-12-22 10:26:11,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdf31ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:11, skipping insertion in model container [2020-12-22 10:26:11,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:11" (3/3) ... [2020-12-22 10:26:11,604 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:26:11,611 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:26:11,618 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:26:11,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:26:11,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:26:11,675 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:26:11,675 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:26:11,675 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:26:11,675 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:26:11,676 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:26:11,676 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:26:11,676 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:26:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states. [2020-12-22 10:26:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:11,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:11,725 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] [2020-12-22 10:26:11,725 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:26:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:11,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410493531] [2020-12-22 10:26:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,010 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 10:26:12,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410493531] [2020-12-22 10:26:12,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:12,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075471446] [2020-12-22 10:26:12,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:26:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:26:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:26:12,036 INFO L87 Difference]: Start difference. First operand 962 states. Second operand 2 states. [2020-12-22 10:26:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,126 INFO L93 Difference]: Finished difference Result 1855 states and 3508 transitions. [2020-12-22 10:26:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:26:12,128 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:26:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,179 INFO L225 Difference]: With dead ends: 1855 [2020-12-22 10:26:12,180 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:26:12,193 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 10:26:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:26:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:26:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:26:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1687 transitions. [2020-12-22 10:26:12,340 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1687 transitions. Word has length 46 [2020-12-22 10:26:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,344 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1687 transitions. [2020-12-22 10:26:12,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:26:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1687 transitions. [2020-12-22 10:26:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:12,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,351 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] [2020-12-22 10:26:12,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:26:12,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:26:12,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943073641] [2020-12-22 10:26:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,603 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 10:26:12,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943073641] [2020-12-22 10:26:12,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:12,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955143738] [2020-12-22 10:26:12,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:26:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:26:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:26:12,609 INFO L87 Difference]: Start difference. First operand 896 states and 1687 transitions. Second operand 5 states. [2020-12-22 10:26:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,951 INFO L93 Difference]: Finished difference Result 975 states and 1811 transitions. [2020-12-22 10:26:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:26:12,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:26:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,959 INFO L225 Difference]: With dead ends: 975 [2020-12-22 10:26:12,959 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:26:12,961 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 10:26:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:26:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:26:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:26:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1626 transitions. [2020-12-22 10:26:12,987 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1626 transitions. Word has length 46 [2020-12-22 10:26:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,988 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1626 transitions. [2020-12-22 10:26:12,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:26:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1626 transitions. [2020-12-22 10:26:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:26:12,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,997 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] [2020-12-22 10:26:12,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:26:12,998 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2064850805, now seen corresponding path program 1 times [2020-12-22 10:26:13,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185949462] [2020-12-22 10:26:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:13,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185949462] [2020-12-22 10:26:13,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:13,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569919807] [2020-12-22 10:26:13,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,130 INFO L87 Difference]: Start difference. First operand 896 states and 1626 transitions. Second operand 3 states. [2020-12-22 10:26:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:19,464 INFO L93 Difference]: Finished difference Result 2400 states and 4499 transitions. [2020-12-22 10:26:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:19,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:26:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:19,476 INFO L225 Difference]: With dead ends: 2400 [2020-12-22 10:26:19,477 INFO L226 Difference]: Without dead ends: 1647 [2020-12-22 10:26:19,479 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 10:26:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-12-22 10:26:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1647. [2020-12-22 10:26:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1647 states. [2020-12-22 10:26:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 3001 transitions. [2020-12-22 10:26:19,534 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 3001 transitions. Word has length 48 [2020-12-22 10:26:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:19,535 INFO L481 AbstractCegarLoop]: Abstraction has 1647 states and 3001 transitions. [2020-12-22 10:26:19,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 3001 transitions. [2020-12-22 10:26:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:19,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:19,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:19,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:26:19,539 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:26:19,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683103997] [2020-12-22 10:26:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:19,770 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 10:26:19,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683103997] [2020-12-22 10:26:19,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:19,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:19,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277876695] [2020-12-22 10:26:19,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:19,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:19,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:19,775 INFO L87 Difference]: Start difference. First operand 1647 states and 3001 transitions. Second operand 3 states. [2020-12-22 10:26:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:19,827 INFO L93 Difference]: Finished difference Result 1791 states and 3231 transitions. [2020-12-22 10:26:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:19,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:19,839 INFO L225 Difference]: With dead ends: 1791 [2020-12-22 10:26:19,839 INFO L226 Difference]: Without dead ends: 1716 [2020-12-22 10:26:19,840 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 10:26:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-12-22 10:26:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2020-12-22 10:26:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1714 states. [2020-12-22 10:26:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 3109 transitions. [2020-12-22 10:26:19,903 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 3109 transitions. Word has length 106 [2020-12-22 10:26:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:19,904 INFO L481 AbstractCegarLoop]: Abstraction has 1714 states and 3109 transitions. [2020-12-22 10:26:19,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 3109 transitions. [2020-12-22 10:26:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:19,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:19,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:19,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:26:19,907 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:26:19,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:19,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586348069] [2020-12-22 10:26:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,125 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 10:26:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586348069] [2020-12-22 10:26:20,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:20,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867831341] [2020-12-22 10:26:20,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:20,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:20,131 INFO L87 Difference]: Start difference. First operand 1714 states and 3109 transitions. Second operand 3 states. [2020-12-22 10:26:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:20,191 INFO L93 Difference]: Finished difference Result 1986 states and 3545 transitions. [2020-12-22 10:26:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:20,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:20,205 INFO L225 Difference]: With dead ends: 1986 [2020-12-22 10:26:20,206 INFO L226 Difference]: Without dead ends: 1844 [2020-12-22 10:26:20,207 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 10:26:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-22 10:26:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2020-12-22 10:26:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1842 states. [2020-12-22 10:26:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 3314 transitions. [2020-12-22 10:26:20,272 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 3314 transitions. Word has length 106 [2020-12-22 10:26:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:20,273 INFO L481 AbstractCegarLoop]: Abstraction has 1842 states and 3314 transitions. [2020-12-22 10:26:20,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 3314 transitions. [2020-12-22 10:26:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:20,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:20,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:20,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:20,275 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:26:20,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:20,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47908445] [2020-12-22 10:26:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,403 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 10:26:20,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47908445] [2020-12-22 10:26:20,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:20,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020505151] [2020-12-22 10:26:20,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:20,407 INFO L87 Difference]: Start difference. First operand 1842 states and 3314 transitions. Second operand 3 states. [2020-12-22 10:26:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:20,473 INFO L93 Difference]: Finished difference Result 2358 states and 4140 transitions. [2020-12-22 10:26:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:20,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:20,487 INFO L225 Difference]: With dead ends: 2358 [2020-12-22 10:26:20,487 INFO L226 Difference]: Without dead ends: 2088 [2020-12-22 10:26:20,489 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 10:26:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2020-12-22 10:26:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2086. [2020-12-22 10:26:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2086 states. [2020-12-22 10:26:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 3702 transitions. [2020-12-22 10:26:20,561 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 3702 transitions. Word has length 106 [2020-12-22 10:26:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:20,562 INFO L481 AbstractCegarLoop]: Abstraction has 2086 states and 3702 transitions. [2020-12-22 10:26:20,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 3702 transitions. [2020-12-22 10:26:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:20,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:20,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:20,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:20,564 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:26:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:20,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699802138] [2020-12-22 10:26:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,752 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 10:26:20,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699802138] [2020-12-22 10:26:20,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145439089] [2020-12-22 10:26:20,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:20,755 INFO L87 Difference]: Start difference. First operand 2086 states and 3702 transitions. Second operand 3 states. [2020-12-22 10:26:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:20,815 INFO L93 Difference]: Finished difference Result 3066 states and 5264 transitions. [2020-12-22 10:26:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:20,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:20,832 INFO L225 Difference]: With dead ends: 3066 [2020-12-22 10:26:20,833 INFO L226 Difference]: Without dead ends: 2552 [2020-12-22 10:26:20,838 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 10:26:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-12-22 10:26:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2020-12-22 10:26:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 10:26:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 4434 transitions. [2020-12-22 10:26:20,923 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 4434 transitions. Word has length 106 [2020-12-22 10:26:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:20,923 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 4434 transitions. [2020-12-22 10:26:20,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 4434 transitions. [2020-12-22 10:26:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:20,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:20,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:20,925 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:26:20,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:20,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919513899] [2020-12-22 10:26:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:21,156 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 10:26:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919513899] [2020-12-22 10:26:21,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:21,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:21,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347450695] [2020-12-22 10:26:21,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:21,159 INFO L87 Difference]: Start difference. First operand 2550 states and 4434 transitions. Second operand 10 states. [2020-12-22 10:26:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:22,284 INFO L93 Difference]: Finished difference Result 18198 states and 29282 transitions. [2020-12-22 10:26:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:22,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:22,395 INFO L225 Difference]: With dead ends: 18198 [2020-12-22 10:26:22,395 INFO L226 Difference]: Without dead ends: 17220 [2020-12-22 10:26:22,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17220 states. [2020-12-22 10:26:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17220 to 3526. [2020-12-22 10:26:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3526 states. [2020-12-22 10:26:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5954 transitions. [2020-12-22 10:26:22,752 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5954 transitions. Word has length 106 [2020-12-22 10:26:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:22,753 INFO L481 AbstractCegarLoop]: Abstraction has 3526 states and 5954 transitions. [2020-12-22 10:26:22,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5954 transitions. [2020-12-22 10:26:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:22,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:22,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:22,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:22,758 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:26:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465164428] [2020-12-22 10:26:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:22,967 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 10:26:22,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465164428] [2020-12-22 10:26:22,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:22,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:22,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580691864] [2020-12-22 10:26:22,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:22,972 INFO L87 Difference]: Start difference. First operand 3526 states and 5954 transitions. Second operand 3 states. [2020-12-22 10:26:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:23,195 INFO L93 Difference]: Finished difference Result 6420 states and 10502 transitions. [2020-12-22 10:26:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:23,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:23,208 INFO L225 Difference]: With dead ends: 6420 [2020-12-22 10:26:23,208 INFO L226 Difference]: Without dead ends: 4466 [2020-12-22 10:26:23,213 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 10:26:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2020-12-22 10:26:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 4464. [2020-12-22 10:26:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-12-22 10:26:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 7404 transitions. [2020-12-22 10:26:23,464 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 7404 transitions. Word has length 108 [2020-12-22 10:26:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:23,465 INFO L481 AbstractCegarLoop]: Abstraction has 4464 states and 7404 transitions. [2020-12-22 10:26:23,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 7404 transitions. [2020-12-22 10:26:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:23,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:23,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:23,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:23,470 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:26:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432446518] [2020-12-22 10:26:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:23,984 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 10:26:23,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432446518] [2020-12-22 10:26:23,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:23,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:23,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788521245] [2020-12-22 10:26:23,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:23,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:23,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:23,988 INFO L87 Difference]: Start difference. First operand 4464 states and 7404 transitions. Second operand 10 states. [2020-12-22 10:26:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:24,794 INFO L93 Difference]: Finished difference Result 7356 states and 11926 transitions. [2020-12-22 10:26:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:24,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:24,806 INFO L225 Difference]: With dead ends: 7356 [2020-12-22 10:26:24,806 INFO L226 Difference]: Without dead ends: 4466 [2020-12-22 10:26:24,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:26:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2020-12-22 10:26:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 4464. [2020-12-22 10:26:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-12-22 10:26:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 7380 transitions. [2020-12-22 10:26:25,100 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 7380 transitions. Word has length 108 [2020-12-22 10:26:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:25,100 INFO L481 AbstractCegarLoop]: Abstraction has 4464 states and 7380 transitions. [2020-12-22 10:26:25,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 7380 transitions. [2020-12-22 10:26:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:25,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:25,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:25,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:25,103 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:26:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:25,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748752131] [2020-12-22 10:26:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:25,206 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 10:26:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748752131] [2020-12-22 10:26:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438759239] [2020-12-22 10:26:25,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:25,209 INFO L87 Difference]: Start difference. First operand 4464 states and 7380 transitions. Second operand 3 states. [2020-12-22 10:26:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:25,605 INFO L93 Difference]: Finished difference Result 9956 states and 15894 transitions. [2020-12-22 10:26:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:25,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:25,624 INFO L225 Difference]: With dead ends: 9956 [2020-12-22 10:26:25,624 INFO L226 Difference]: Without dead ends: 7066 [2020-12-22 10:26:25,631 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 10:26:25,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2020-12-22 10:26:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 7064. [2020-12-22 10:26:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7064 states. [2020-12-22 10:26:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 11348 transitions. [2020-12-22 10:26:26,115 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 11348 transitions. Word has length 108 [2020-12-22 10:26:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:26,116 INFO L481 AbstractCegarLoop]: Abstraction has 7064 states and 11348 transitions. [2020-12-22 10:26:26,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 11348 transitions. [2020-12-22 10:26:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:26,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:26,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:26,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:26,119 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:26:26,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:26,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349097473] [2020-12-22 10:26:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:26,221 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 10:26:26,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349097473] [2020-12-22 10:26:26,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:26,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437189143] [2020-12-22 10:26:26,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:26,224 INFO L87 Difference]: Start difference. First operand 7064 states and 11348 transitions. Second operand 3 states. [2020-12-22 10:26:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:26,898 INFO L93 Difference]: Finished difference Result 17468 states and 27318 transitions. [2020-12-22 10:26:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:26,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:26,925 INFO L225 Difference]: With dead ends: 17468 [2020-12-22 10:26:26,925 INFO L226 Difference]: Without dead ends: 11978 [2020-12-22 10:26:26,936 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 10:26:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11978 states. [2020-12-22 10:26:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11978 to 11976. [2020-12-22 10:26:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11976 states. [2020-12-22 10:26:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11976 states to 11976 states and 18756 transitions. [2020-12-22 10:26:27,904 INFO L78 Accepts]: Start accepts. Automaton has 11976 states and 18756 transitions. Word has length 108 [2020-12-22 10:26:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:27,905 INFO L481 AbstractCegarLoop]: Abstraction has 11976 states and 18756 transitions. [2020-12-22 10:26:27,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11976 states and 18756 transitions. [2020-12-22 10:26:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:27,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:27,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:27,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:27,907 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:26:27,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:27,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495259738] [2020-12-22 10:26:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:27,994 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 10:26:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495259738] [2020-12-22 10:26:27,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:27,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:27,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526289323] [2020-12-22 10:26:27,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:27,997 INFO L87 Difference]: Start difference. First operand 11976 states and 18756 transitions. Second operand 3 states. [2020-12-22 10:26:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:29,346 INFO L93 Difference]: Finished difference Result 31628 states and 48582 transitions. [2020-12-22 10:26:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:29,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:29,397 INFO L225 Difference]: With dead ends: 31628 [2020-12-22 10:26:29,397 INFO L226 Difference]: Without dead ends: 21226 [2020-12-22 10:26:29,419 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 10:26:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2020-12-22 10:26:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 21224. [2020-12-22 10:26:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21224 states. [2020-12-22 10:26:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21224 states to 21224 states and 32516 transitions. [2020-12-22 10:26:30,993 INFO L78 Accepts]: Start accepts. Automaton has 21224 states and 32516 transitions. Word has length 108 [2020-12-22 10:26:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:30,993 INFO L481 AbstractCegarLoop]: Abstraction has 21224 states and 32516 transitions. [2020-12-22 10:26:30,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21224 states and 32516 transitions. [2020-12-22 10:26:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:30,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:30,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:30,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:30,996 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:26:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:30,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177249551] [2020-12-22 10:26:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:31,076 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 10:26:31,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177249551] [2020-12-22 10:26:31,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:31,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:31,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730106104] [2020-12-22 10:26:31,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:31,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:31,078 INFO L87 Difference]: Start difference. First operand 21224 states and 32516 transitions. Second operand 3 states. [2020-12-22 10:26:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:33,133 INFO L93 Difference]: Finished difference Result 58220 states and 87942 transitions. [2020-12-22 10:26:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:33,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:33,225 INFO L225 Difference]: With dead ends: 58220 [2020-12-22 10:26:33,225 INFO L226 Difference]: Without dead ends: 38570 [2020-12-22 10:26:33,259 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 10:26:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38570 states. [2020-12-22 10:26:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38570 to 38568. [2020-12-22 10:26:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38568 states. [2020-12-22 10:26:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38568 states to 38568 states and 57924 transitions. [2020-12-22 10:26:35,492 INFO L78 Accepts]: Start accepts. Automaton has 38568 states and 57924 transitions. Word has length 108 [2020-12-22 10:26:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:35,493 INFO L481 AbstractCegarLoop]: Abstraction has 38568 states and 57924 transitions. [2020-12-22 10:26:35,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38568 states and 57924 transitions. [2020-12-22 10:26:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:35,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:35,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:35,494 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:26:35,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:35,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491174599] [2020-12-22 10:26:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:35,627 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 10:26:35,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491174599] [2020-12-22 10:26:35,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:35,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:35,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015684159] [2020-12-22 10:26:35,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:35,629 INFO L87 Difference]: Start difference. First operand 38568 states and 57924 transitions. Second operand 8 states. [2020-12-22 10:26:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:39,470 INFO L93 Difference]: Finished difference Result 70223 states and 103989 transitions. [2020-12-22 10:26:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:39,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:26:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:39,643 INFO L225 Difference]: With dead ends: 70223 [2020-12-22 10:26:39,643 INFO L226 Difference]: Without dead ends: 70221 [2020-12-22 10:26:39,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:26:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70221 states. [2020-12-22 10:26:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70221 to 40104. [2020-12-22 10:26:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40104 states. [2020-12-22 10:26:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40104 states to 40104 states and 59332 transitions. [2020-12-22 10:26:42,687 INFO L78 Accepts]: Start accepts. Automaton has 40104 states and 59332 transitions. Word has length 109 [2020-12-22 10:26:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:42,687 INFO L481 AbstractCegarLoop]: Abstraction has 40104 states and 59332 transitions. [2020-12-22 10:26:42,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:26:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40104 states and 59332 transitions. [2020-12-22 10:26:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 10:26:42,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:42,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:42,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:26:42,690 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash -538369311, now seen corresponding path program 1 times [2020-12-22 10:26:42,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:42,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569054615] [2020-12-22 10:26:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:42,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569054615] [2020-12-22 10:26:42,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:42,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620936480] [2020-12-22 10:26:42,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:42,792 INFO L87 Difference]: Start difference. First operand 40104 states and 59332 transitions. Second operand 3 states. [2020-12-22 10:26:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:51,195 INFO L93 Difference]: Finished difference Result 43112 states and 64956 transitions. [2020-12-22 10:26:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:51,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 10:26:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:51,251 INFO L225 Difference]: With dead ends: 43112 [2020-12-22 10:26:51,252 INFO L226 Difference]: Without dead ends: 41608 [2020-12-22 10:26:51,265 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 10:26:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41608 states. [2020-12-22 10:26:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41608 to 41606. [2020-12-22 10:26:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41606 states. [2020-12-22 10:26:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41606 states to 41606 states and 61273 transitions. [2020-12-22 10:26:53,906 INFO L78 Accepts]: Start accepts. Automaton has 41606 states and 61273 transitions. Word has length 121 [2020-12-22 10:26:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:53,907 INFO L481 AbstractCegarLoop]: Abstraction has 41606 states and 61273 transitions. [2020-12-22 10:26:53,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 41606 states and 61273 transitions. [2020-12-22 10:26:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 10:26:53,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:53,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:53,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:26:53,911 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 668333094, now seen corresponding path program 1 times [2020-12-22 10:26:53,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:53,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410987179] [2020-12-22 10:26:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410987179] [2020-12-22 10:26:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:53,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940321994] [2020-12-22 10:26:53,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:53,999 INFO L87 Difference]: Start difference. First operand 41606 states and 61273 transitions. Second operand 3 states. [2020-12-22 10:27:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:02,122 INFO L93 Difference]: Finished difference Result 47616 states and 70778 transitions. [2020-12-22 10:27:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:02,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2020-12-22 10:27:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:02,173 INFO L225 Difference]: With dead ends: 47616 [2020-12-22 10:27:02,174 INFO L226 Difference]: Without dead ends: 44610 [2020-12-22 10:27:02,185 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 10:27:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44610 states. [2020-12-22 10:27:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44610 to 44610. [2020-12-22 10:27:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44610 states. [2020-12-22 10:27:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44610 states to 44610 states and 64945 transitions. [2020-12-22 10:27:04,652 INFO L78 Accepts]: Start accepts. Automaton has 44610 states and 64945 transitions. Word has length 123 [2020-12-22 10:27:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:04,652 INFO L481 AbstractCegarLoop]: Abstraction has 44610 states and 64945 transitions. [2020-12-22 10:27:04,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 44610 states and 64945 transitions. [2020-12-22 10:27:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 10:27:04,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:04,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:04,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:27:04,655 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 8608107, now seen corresponding path program 1 times [2020-12-22 10:27:04,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:04,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085398345] [2020-12-22 10:27:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085398345] [2020-12-22 10:27:04,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:04,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118915573] [2020-12-22 10:27:04,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:27:04,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:04,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:27:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:04,792 INFO L87 Difference]: Start difference. First operand 44610 states and 64945 transitions. Second operand 4 states. [2020-12-22 10:27:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:15,816 INFO L93 Difference]: Finished difference Result 57379 states and 82629 transitions. [2020-12-22 10:27:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:27:15,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 10:27:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:15,870 INFO L225 Difference]: With dead ends: 57379 [2020-12-22 10:27:15,870 INFO L226 Difference]: Without dead ends: 51369 [2020-12-22 10:27:15,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51369 states. [2020-12-22 10:27:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51369 to 50618. [2020-12-22 10:27:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50618 states. [2020-12-22 10:27:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50618 states to 50618 states and 72597 transitions. [2020-12-22 10:27:18,709 INFO L78 Accepts]: Start accepts. Automaton has 50618 states and 72597 transitions. Word has length 125 [2020-12-22 10:27:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:18,709 INFO L481 AbstractCegarLoop]: Abstraction has 50618 states and 72597 transitions. [2020-12-22 10:27:18,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 50618 states and 72597 transitions. [2020-12-22 10:27:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:18,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:18,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:27:18,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:27:18,733 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 949310851, now seen corresponding path program 1 times [2020-12-22 10:27:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:18,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232509244] [2020-12-22 10:27:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:27:18,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232509244] [2020-12-22 10:27:18,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:18,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:18,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087724851] [2020-12-22 10:27:18,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:18,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:18,962 INFO L87 Difference]: Start difference. First operand 50618 states and 72597 transitions. Second operand 10 states. [2020-12-22 10:27:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:37,760 INFO L93 Difference]: Finished difference Result 366284 states and 534622 transitions. [2020-12-22 10:27:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:37,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:38,395 INFO L225 Difference]: With dead ends: 366284 [2020-12-22 10:27:38,395 INFO L226 Difference]: Without dead ends: 327754 [2020-12-22 10:27:38,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327754 states. [2020-12-22 10:27:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327754 to 89146. [2020-12-22 10:27:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89146 states. [2020-12-22 10:27:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89146 states to 89146 states and 128661 transitions. [2020-12-22 10:27:46,286 INFO L78 Accepts]: Start accepts. Automaton has 89146 states and 128661 transitions. Word has length 148 [2020-12-22 10:27:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:46,286 INFO L481 AbstractCegarLoop]: Abstraction has 89146 states and 128661 transitions. [2020-12-22 10:27:46,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 89146 states and 128661 transitions. [2020-12-22 10:27:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:46,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:46,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:46,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:27:46,317 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 978833069, now seen corresponding path program 1 times [2020-12-22 10:27:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:46,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601798114] [2020-12-22 10:27:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:27:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601798114] [2020-12-22 10:27:46,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:46,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987252695] [2020-12-22 10:27:46,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:46,561 INFO L87 Difference]: Start difference. First operand 89146 states and 128661 transitions. Second operand 10 states. [2020-12-22 10:28:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:10,939 INFO L93 Difference]: Finished difference Result 404812 states and 590686 transitions. [2020-12-22 10:28:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:10,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:11,541 INFO L225 Difference]: With dead ends: 404812 [2020-12-22 10:28:11,542 INFO L226 Difference]: Without dead ends: 366282 [2020-12-22 10:28:11,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366282 states. [2020-12-22 10:28:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366282 to 147002. [2020-12-22 10:28:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147002 states. [2020-12-22 10:28:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147002 states to 147002 states and 212437 transitions. [2020-12-22 10:28:24,644 INFO L78 Accepts]: Start accepts. Automaton has 147002 states and 212437 transitions. Word has length 148 [2020-12-22 10:28:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:24,646 INFO L481 AbstractCegarLoop]: Abstraction has 147002 states and 212437 transitions. [2020-12-22 10:28:24,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 147002 states and 212437 transitions. [2020-12-22 10:28:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:24,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:24,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:24,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:28:24,678 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1252520781, now seen corresponding path program 1 times [2020-12-22 10:28:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:24,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503159108] [2020-12-22 10:28:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:28:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503159108] [2020-12-22 10:28:25,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:25,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126436119] [2020-12-22 10:28:25,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:25,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:25,117 INFO L87 Difference]: Start difference. First operand 147002 states and 212437 transitions. Second operand 10 states. [2020-12-22 10:28:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:54,588 INFO L93 Difference]: Finished difference Result 443340 states and 646750 transitions. [2020-12-22 10:28:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:54,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:55,255 INFO L225 Difference]: With dead ends: 443340 [2020-12-22 10:28:55,255 INFO L226 Difference]: Without dead ends: 404810 [2020-12-22 10:28:55,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404810 states.