/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.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:25:50,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:25:50,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:25:50,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:25:50,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:25:50,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:25:50,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:25:50,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:25:50,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:25:50,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:25:50,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:25:50,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:25:50,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:25:50,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:25:50,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:25:50,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:25:50,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:25:50,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:25:50,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:25:50,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:25:50,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:25:50,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:25:50,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:25:50,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:25:50,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:25:50,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:25:50,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:25:50,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:25:50,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:25:50,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:25:50,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:25:50,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:25:50,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:25:50,325 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:25:50,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:25:50,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:25:50,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:25:50,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:25:50,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:25:50,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:25:50,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:25:50,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:25:50,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:25:50,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:25:50,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:25:50,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:25:50,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:25:50,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:25:50,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:25:50,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:25:50,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:25:50,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:25:50,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:25:50,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:25:50,817 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:25:50,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:25:50,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5859c2/4ba176b456a4480bac2b914fa0207b5d/FLAG46f2d866e [2020-12-22 10:25:51,825 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:25:51,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:25:51,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5859c2/4ba176b456a4480bac2b914fa0207b5d/FLAG46f2d866e [2020-12-22 10:25:52,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5859c2/4ba176b456a4480bac2b914fa0207b5d [2020-12-22 10:25:52,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:25:52,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:25:52,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:52,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:25:52,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:25:52,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:52" (1/1) ... [2020-12-22 10:25:52,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec0764d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:52, skipping insertion in model container [2020-12-22 10:25:52,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:52" (1/1) ... [2020-12-22 10:25:52,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:25:52,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:25:52,988 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.ufo.UNBOUNDED.pals+Problem12_label09.c[26875,26888] [2020-12-22 10:25:53,083 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.ufo.UNBOUNDED.pals+Problem12_label09.c[34380,34393] [2020-12-22 10:25:53,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:54,007 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:25:54,134 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.ufo.UNBOUNDED.pals+Problem12_label09.c[26875,26888] [2020-12-22 10:25:54,149 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.ufo.UNBOUNDED.pals+Problem12_label09.c[34380,34393] [2020-12-22 10:25:54,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:54,741 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:25:54,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54 WrapperNode [2020-12-22 10:25:54,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:54,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:54,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:25:54,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:25:54,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:54,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:55,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:25:55,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:25:55,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:25:55,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:55,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (1/1) ... [2020-12-22 10:25:56,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:25:56,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:25:56,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:25:56,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:25:56,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (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 10:25:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:25:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:25:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:25:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:26:01,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:26:01,939 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:26:01,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:01 BoogieIcfgContainer [2020-12-22 10:26:01,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:26:01,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:26:01,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:26:01,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:26:01,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:52" (1/3) ... [2020-12-22 10:26:01,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc1bb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:01, skipping insertion in model container [2020-12-22 10:26:01,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:54" (2/3) ... [2020-12-22 10:26:01,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc1bb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:01, skipping insertion in model container [2020-12-22 10:26:01,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:01" (3/3) ... [2020-12-22 10:26:01,953 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:26:01,960 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:26:01,966 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:26:01,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:26:02,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:26:02,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:26:02,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:26:02,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:26:02,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:26:02,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:26:02,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:26:02,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:26:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:26:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:02,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:02,074 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 10:26:02,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:26:02,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:02,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440614094] [2020-12-22 10:26:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:02,357 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 10:26:02,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440614094] [2020-12-22 10:26:02,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:02,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:02,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790049784] [2020-12-22 10:26:02,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:26:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:26:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:26:02,383 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:26:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:02,470 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:26:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:26:02,472 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:26:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:02,516 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:26:02,516 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:26:02,529 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 10:26:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:26:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:26:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:26:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:26:02,658 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:26:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:26:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:26:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:26:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:02,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:02,670 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 10:26:02,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:26:02,671 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:02,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:26:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:02,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267307955] [2020-12-22 10:26:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:02,909 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 10:26:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267307955] [2020-12-22 10:26:02,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:02,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711356378] [2020-12-22 10:26:02,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:26:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:26:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:26:02,914 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:26:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:03,172 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:26:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:26:03,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:26:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:03,178 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:26:03,179 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:26:03,180 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 10:26:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:26:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:26:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:26:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:26:03,206 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:26:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:03,207 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:26:03,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:26:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:26:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:26:03,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:03,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:03,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:26:03,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash -338813030, now seen corresponding path program 1 times [2020-12-22 10:26:03,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:03,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823955572] [2020-12-22 10:26:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:03,634 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 10:26:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823955572] [2020-12-22 10:26:03,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:03,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:03,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118443455] [2020-12-22 10:26:03,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:26:03,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:26:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:26:03,638 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 4 states. [2020-12-22 10:26:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,286 INFO L93 Difference]: Finished difference Result 3153 states and 5938 transitions. [2020-12-22 10:26:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:26:13,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:26:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,302 INFO L225 Difference]: With dead ends: 3153 [2020-12-22 10:26:13,303 INFO L226 Difference]: Without dead ends: 2400 [2020-12-22 10:26:13,305 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 10:26:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-12-22 10:26:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2020-12-22 10:26:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-12-22 10:26:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3743 transitions. [2020-12-22 10:26:13,365 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3743 transitions. Word has length 67 [2020-12-22 10:26:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,366 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 3743 transitions. [2020-12-22 10:26:13,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:26:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3743 transitions. [2020-12-22 10:26:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,368 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 10:26:13,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:26:13,369 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:26:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374892993] [2020-12-22 10:26:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,521 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 10:26:13,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374892993] [2020-12-22 10:26:13,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723801288] [2020-12-22 10:26:13,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,527 INFO L87 Difference]: Start difference. First operand 2400 states and 3743 transitions. Second operand 3 states. [2020-12-22 10:26:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,584 INFO L93 Difference]: Finished difference Result 2548 states and 3979 transitions. [2020-12-22 10:26:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,601 INFO L225 Difference]: With dead ends: 2548 [2020-12-22 10:26:13,601 INFO L226 Difference]: Without dead ends: 2471 [2020-12-22 10:26:13,603 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 10:26:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-12-22 10:26:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-12-22 10:26:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-12-22 10:26:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3854 transitions. [2020-12-22 10:26:13,667 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3854 transitions. Word has length 106 [2020-12-22 10:26:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,672 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3854 transitions. [2020-12-22 10:26:13,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3854 transitions. [2020-12-22 10:26:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,675 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 10:26:13,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:26:13,675 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:26:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687582838] [2020-12-22 10:26:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,840 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 10:26:13,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687582838] [2020-12-22 10:26:13,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781889689] [2020-12-22 10:26:13,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,846 INFO L87 Difference]: Start difference. First operand 2469 states and 3854 transitions. Second operand 3 states. [2020-12-22 10:26:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,916 INFO L93 Difference]: Finished difference Result 2749 states and 4302 transitions. [2020-12-22 10:26:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,933 INFO L225 Difference]: With dead ends: 2749 [2020-12-22 10:26:13,934 INFO L226 Difference]: Without dead ends: 2603 [2020-12-22 10:26:13,936 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 10:26:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-12-22 10:26:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2020-12-22 10:26:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2020-12-22 10:26:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 4065 transitions. [2020-12-22 10:26:14,016 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 4065 transitions. Word has length 106 [2020-12-22 10:26:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,016 INFO L481 AbstractCegarLoop]: Abstraction has 2601 states and 4065 transitions. [2020-12-22 10:26:14,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 4065 transitions. [2020-12-22 10:26:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,024 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 10:26:14,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:14,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:26:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684644253] [2020-12-22 10:26:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,170 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 10:26:14,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684644253] [2020-12-22 10:26:14,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072933132] [2020-12-22 10:26:14,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,173 INFO L87 Difference]: Start difference. First operand 2601 states and 4065 transitions. Second operand 3 states. [2020-12-22 10:26:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:14,251 INFO L93 Difference]: Finished difference Result 3133 states and 4915 transitions. [2020-12-22 10:26:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:14,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:14,274 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:26:14,275 INFO L226 Difference]: Without dead ends: 2855 [2020-12-22 10:26:14,279 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 10:26:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2020-12-22 10:26:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2020-12-22 10:26:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2853 states. [2020-12-22 10:26:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4465 transitions. [2020-12-22 10:26:14,370 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4465 transitions. Word has length 106 [2020-12-22 10:26:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 2853 states and 4465 transitions. [2020-12-22 10:26:14,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4465 transitions. [2020-12-22 10:26:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,373 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 10:26:14,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:14,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:26:14,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293434060] [2020-12-22 10:26:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,495 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 10:26:14,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293434060] [2020-12-22 10:26:14,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445774730] [2020-12-22 10:26:14,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,498 INFO L87 Difference]: Start difference. First operand 2853 states and 4465 transitions. Second operand 3 states. [2020-12-22 10:26:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:14,576 INFO L93 Difference]: Finished difference Result 3865 states and 6075 transitions. [2020-12-22 10:26:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:14,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:14,594 INFO L225 Difference]: With dead ends: 3865 [2020-12-22 10:26:14,594 INFO L226 Difference]: Without dead ends: 3335 [2020-12-22 10:26:14,598 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 10:26:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-12-22 10:26:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2020-12-22 10:26:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3333 states. [2020-12-22 10:26:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5221 transitions. [2020-12-22 10:26:14,777 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5221 transitions. Word has length 106 [2020-12-22 10:26:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,778 INFO L481 AbstractCegarLoop]: Abstraction has 3333 states and 5221 transitions. [2020-12-22 10:26:14,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5221 transitions. [2020-12-22 10:26:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,780 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 10:26:14,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:14,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:26:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435227407] [2020-12-22 10:26:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,923 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 10:26:14,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435227407] [2020-12-22 10:26:14,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033405990] [2020-12-22 10:26:14,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,926 INFO L87 Difference]: Start difference. First operand 3333 states and 5221 transitions. Second operand 3 states. [2020-12-22 10:26:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:15,079 INFO L93 Difference]: Finished difference Result 5257 states and 8263 transitions. [2020-12-22 10:26:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:15,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:15,105 INFO L225 Difference]: With dead ends: 5257 [2020-12-22 10:26:15,105 INFO L226 Difference]: Without dead ends: 4247 [2020-12-22 10:26:15,110 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 10:26:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2020-12-22 10:26:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4245. [2020-12-22 10:26:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4245 states. [2020-12-22 10:26:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6645 transitions. [2020-12-22 10:26:15,309 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6645 transitions. Word has length 106 [2020-12-22 10:26:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:15,309 INFO L481 AbstractCegarLoop]: Abstraction has 4245 states and 6645 transitions. [2020-12-22 10:26:15,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6645 transitions. [2020-12-22 10:26:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:15,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:15,312 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 10:26:15,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:15,312 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:26:15,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:15,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754355463] [2020-12-22 10:26:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:15,430 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 10:26:15,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754355463] [2020-12-22 10:26:15,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:15,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162187694] [2020-12-22 10:26:15,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:15,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:15,435 INFO L87 Difference]: Start difference. First operand 4245 states and 6645 transitions. Second operand 3 states. [2020-12-22 10:26:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:15,651 INFO L93 Difference]: Finished difference Result 7897 states and 12375 transitions. [2020-12-22 10:26:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:15,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:15,703 INFO L225 Difference]: With dead ends: 7897 [2020-12-22 10:26:15,703 INFO L226 Difference]: Without dead ends: 5975 [2020-12-22 10:26:15,708 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 10:26:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2020-12-22 10:26:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5973. [2020-12-22 10:26:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5973 states. [2020-12-22 10:26:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 9317 transitions. [2020-12-22 10:26:16,034 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 9317 transitions. Word has length 106 [2020-12-22 10:26:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:16,034 INFO L481 AbstractCegarLoop]: Abstraction has 5973 states and 9317 transitions. [2020-12-22 10:26:16,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 9317 transitions. [2020-12-22 10:26:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:16,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:16,036 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 10:26:16,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:16,037 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:26:16,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:16,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482552801] [2020-12-22 10:26:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:16,164 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 10:26:16,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482552801] [2020-12-22 10:26:16,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:16,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208935980] [2020-12-22 10:26:16,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:16,167 INFO L87 Difference]: Start difference. First operand 5973 states and 9317 transitions. Second operand 3 states. [2020-12-22 10:26:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:16,518 INFO L93 Difference]: Finished difference Result 12889 states and 20071 transitions. [2020-12-22 10:26:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:16,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:16,540 INFO L225 Difference]: With dead ends: 12889 [2020-12-22 10:26:16,540 INFO L226 Difference]: Without dead ends: 9239 [2020-12-22 10:26:16,549 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 10:26:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9239 states. [2020-12-22 10:26:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9239 to 9237. [2020-12-22 10:26:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9237 states. [2020-12-22 10:26:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 14309 transitions. [2020-12-22 10:26:16,976 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 14309 transitions. Word has length 106 [2020-12-22 10:26:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:16,976 INFO L481 AbstractCegarLoop]: Abstraction has 9237 states and 14309 transitions. [2020-12-22 10:26:16,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 14309 transitions. [2020-12-22 10:26:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:16,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:16,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:16,978 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:26:16,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:16,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774373782] [2020-12-22 10:26:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:17,237 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 10:26:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774373782] [2020-12-22 10:26:17,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:17,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:17,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713353525] [2020-12-22 10:26:17,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:17,240 INFO L87 Difference]: Start difference. First operand 9237 states and 14309 transitions. Second operand 10 states. [2020-12-22 10:26:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:21,724 INFO L93 Difference]: Finished difference Result 119861 states and 185333 transitions. [2020-12-22 10:26:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:21,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:22,030 INFO L225 Difference]: With dead ends: 119861 [2020-12-22 10:26:22,031 INFO L226 Difference]: Without dead ends: 112947 [2020-12-22 10:26:22,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2020-12-22 10:26:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 16149. [2020-12-22 10:26:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16149 states. [2020-12-22 10:26:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 24741 transitions. [2020-12-22 10:26:24,844 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 24741 transitions. Word has length 106 [2020-12-22 10:26:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:24,844 INFO L481 AbstractCegarLoop]: Abstraction has 16149 states and 24741 transitions. [2020-12-22 10:26:24,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 24741 transitions. [2020-12-22 10:26:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:24,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:24,846 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 10:26:24,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:24,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:26:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:24,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362096742] [2020-12-22 10:26:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:24,945 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 10:26:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362096742] [2020-12-22 10:26:24,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:24,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864486314] [2020-12-22 10:26:24,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:24,948 INFO L87 Difference]: Start difference. First operand 16149 states and 24741 transitions. Second operand 3 states. [2020-12-22 10:26:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:26,115 INFO L93 Difference]: Finished difference Result 42393 states and 64551 transitions. [2020-12-22 10:26:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:26,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:26,175 INFO L225 Difference]: With dead ends: 42393 [2020-12-22 10:26:26,175 INFO L226 Difference]: Without dead ends: 28567 [2020-12-22 10:26:26,198 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 10:26:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28567 states. [2020-12-22 10:26:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28567 to 28309. [2020-12-22 10:26:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:26:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42533 transitions. [2020-12-22 10:26:28,135 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42533 transitions. Word has length 108 [2020-12-22 10:26:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:28,135 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42533 transitions. [2020-12-22 10:26:28,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42533 transitions. [2020-12-22 10:26:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:28,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:28,137 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 10:26:28,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:28,138 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:26:28,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:28,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440074502] [2020-12-22 10:26:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:28,523 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 10:26:28,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440074502] [2020-12-22 10:26:28,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:28,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:28,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680623804] [2020-12-22 10:26:28,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:28,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:28,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:28,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:28,526 INFO L87 Difference]: Start difference. First operand 28309 states and 42533 transitions. Second operand 10 states. [2020-12-22 10:26:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:30,588 INFO L93 Difference]: Finished difference Result 54297 states and 81447 transitions. [2020-12-22 10:26:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:30,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:30,648 INFO L225 Difference]: With dead ends: 54297 [2020-12-22 10:26:30,648 INFO L226 Difference]: Without dead ends: 28311 [2020-12-22 10:26:30,686 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 10:26:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28311 states. [2020-12-22 10:26:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28311 to 28309. [2020-12-22 10:26:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:26:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42277 transitions. [2020-12-22 10:26:32,729 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42277 transitions. Word has length 108 [2020-12-22 10:26:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:32,729 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42277 transitions. [2020-12-22 10:26:32,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42277 transitions. [2020-12-22 10:26:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:32,731 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 10:26:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:32,732 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:26:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972195099] [2020-12-22 10:26:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:32,876 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 10:26:32,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972195099] [2020-12-22 10:26:32,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:32,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:32,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379066041] [2020-12-22 10:26:32,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:26:32,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:26:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:26:32,879 INFO L87 Difference]: Start difference. First operand 28309 states and 42277 transitions. Second operand 6 states. [2020-12-22 10:26:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:35,281 INFO L93 Difference]: Finished difference Result 54295 states and 80934 transitions. [2020-12-22 10:26:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:26:35,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:26:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:35,333 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 10:26:35,333 INFO L226 Difference]: Without dead ends: 28309 [2020-12-22 10:26:35,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:26:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28309 states. [2020-12-22 10:26:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28309 to 28309. [2020-12-22 10:26:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:26:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42021 transitions. [2020-12-22 10:26:37,239 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42021 transitions. Word has length 109 [2020-12-22 10:26:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:37,239 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42021 transitions. [2020-12-22 10:26:37,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:26:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42021 transitions. [2020-12-22 10:26:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:37,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:37,242 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 10:26:37,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:37,243 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:26:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:37,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429902285] [2020-12-22 10:26:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:37,379 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 10:26:37,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429902285] [2020-12-22 10:26:37,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:37,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:37,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665736928] [2020-12-22 10:26:37,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:37,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:37,382 INFO L87 Difference]: Start difference. First operand 28309 states and 42021 transitions. Second operand 8 states. [2020-12-22 10:26:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:40,684 INFO L93 Difference]: Finished difference Result 47679 states and 70234 transitions. [2020-12-22 10:26:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:40,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:26:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:40,747 INFO L225 Difference]: With dead ends: 47679 [2020-12-22 10:26:40,747 INFO L226 Difference]: Without dead ends: 47677 [2020-12-22 10:26:40,760 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 10:26:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47677 states. [2020-12-22 10:26:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47677 to 29077. [2020-12-22 10:26:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29077 states. [2020-12-22 10:26:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29077 states to 29077 states and 42661 transitions. [2020-12-22 10:26:43,219 INFO L78 Accepts]: Start accepts. Automaton has 29077 states and 42661 transitions. Word has length 109 [2020-12-22 10:26:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:43,219 INFO L481 AbstractCegarLoop]: Abstraction has 29077 states and 42661 transitions. [2020-12-22 10:26:43,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:26:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 29077 states and 42661 transitions. [2020-12-22 10:26:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:26:43,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:43,234 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, 1] [2020-12-22 10:26:43,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:26:43,234 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:26:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156669671] [2020-12-22 10:26:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:43,312 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 10:26:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156669671] [2020-12-22 10:26:43,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:43,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304571443] [2020-12-22 10:26:43,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:43,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:43,314 INFO L87 Difference]: Start difference. First operand 29077 states and 42661 transitions. Second operand 3 states. [2020-12-22 10:26:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:45,923 INFO L93 Difference]: Finished difference Result 56220 states and 82603 transitions. [2020-12-22 10:26:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:45,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:26:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:45,968 INFO L225 Difference]: With dead ends: 56220 [2020-12-22 10:26:45,969 INFO L226 Difference]: Without dead ends: 41625 [2020-12-22 10:26:45,989 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 10:26:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41625 states. [2020-12-22 10:26:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41625 to 41623. [2020-12-22 10:26:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:26:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60711 transitions. [2020-12-22 10:26:49,161 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60711 transitions. Word has length 110 [2020-12-22 10:26:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:49,162 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60711 transitions. [2020-12-22 10:26:49,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60711 transitions. [2020-12-22 10:26:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 10:26:49,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:49,168 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, 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] [2020-12-22 10:26:49,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:26:49,169 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash 852907853, now seen corresponding path program 1 times [2020-12-22 10:26:49,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:49,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350547608] [2020-12-22 10:26:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350547608] [2020-12-22 10:26:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556646202] [2020-12-22 10:26:49,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:26:49,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:26:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:26:49,333 INFO L87 Difference]: Start difference. First operand 41623 states and 60711 transitions. Second operand 4 states. [2020-12-22 10:26:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:58,779 INFO L93 Difference]: Finished difference Result 45417 states and 67074 transitions. [2020-12-22 10:26:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:26:58,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 10:26:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:58,822 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:26:58,822 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:26:58,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:26:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:27:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 42374. [2020-12-22 10:27:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:27:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61464 transitions. [2020-12-22 10:27:01,578 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61464 transitions. Word has length 138 [2020-12-22 10:27:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:01,579 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61464 transitions. [2020-12-22 10:27:01,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61464 transitions. [2020-12-22 10:27:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:01,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:01,600 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:01,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:27:01,601 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:27:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:01,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696762626] [2020-12-22 10:27:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:27:01,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696762626] [2020-12-22 10:27:01,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:01,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:01,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697222501] [2020-12-22 10:27:01,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:01,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:01,824 INFO L87 Difference]: Start difference. First operand 42374 states and 61464 transitions. Second operand 10 states. [2020-12-22 10:27:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:22,353 INFO L93 Difference]: Finished difference Result 364312 states and 528801 transitions. [2020-12-22 10:27:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:22,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:22,875 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:27:22,876 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:27:22,984 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 10:27:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:27:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:27:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:27:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118168 transitions. [2020-12-22 10:27:31,438 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118168 transitions. Word has length 148 [2020-12-22 10:27:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:31,439 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118168 transitions. [2020-12-22 10:27:31,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118168 transitions. [2020-12-22 10:27:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:31,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:31,461 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:31,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:27:31,461 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:27:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660665259] [2020-12-22 10:27:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:27:31,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660665259] [2020-12-22 10:27:31,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:31,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:31,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160278712] [2020-12-22 10:27:31,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:31,661 INFO L87 Difference]: Start difference. First operand 81670 states and 118168 transitions. Second operand 10 states. [2020-12-22 10:27:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:58,124 INFO L93 Difference]: Finished difference Result 403608 states and 585505 transitions. [2020-12-22 10:27:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:58,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:58,711 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:27:58,711 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:27:58,850 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 10:27:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:28:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:28:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:28:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 202904 transitions. [2020-12-22 10:28:12,555 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 202904 transitions. Word has length 148 [2020-12-22 10:28:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:12,556 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 202904 transitions. [2020-12-22 10:28:12,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 202904 transitions. [2020-12-22 10:28:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:12,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:12,583 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:12,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:28:12,583 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:12,584 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:28:12,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:12,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224940778] [2020-12-22 10:28:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:28:13,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224940778] [2020-12-22 10:28:13,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:13,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152471591] [2020-12-22 10:28:13,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:13,035 INFO L87 Difference]: Start difference. First operand 140678 states and 202904 transitions. Second operand 10 states. [2020-12-22 10:28:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:44,469 INFO L93 Difference]: Finished difference Result 442904 states and 642209 transitions. [2020-12-22 10:28:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:44,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:45,070 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:28:45,070 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:28:45,157 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 10:28:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:29:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:29:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:29:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 259608 transitions. [2020-12-22 10:29:03,126 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 259608 transitions. Word has length 148 [2020-12-22 10:29:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:03,126 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 259608 transitions. [2020-12-22 10:29:03,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:29:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 259608 transitions. [2020-12-22 10:29:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:29:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:03,154 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:29:03,154 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:29:03,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857157155] [2020-12-22 10:29:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:29:03,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857157155] [2020-12-22 10:29:03,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:29:03,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:29:03,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493070200] [2020-12-22 10:29:03,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:29:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:29:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:29:03,366 INFO L87 Difference]: Start difference. First operand 179974 states and 259608 transitions. Second operand 10 states.