/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:16:00,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:16:00,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:16:00,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:16:00,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:16:00,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:16:00,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:16:00,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:16:00,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:16:00,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:16:00,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:16:00,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:16:00,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:16:00,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:16:00,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:16:00,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:16:00,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:16:00,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:16:00,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:16:00,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:16:00,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:16:00,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:16:00,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:16:00,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:16:00,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:16:00,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:16:00,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:16:00,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:16:00,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:16:00,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:16:00,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:16:00,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:16:00,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:16:00,454 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:16:00,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:16:00,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:16:00,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:16:00,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:16:00,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:16:00,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:16:00,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:16:00,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:16:00,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:16:00,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:16:00,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:16:00,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:16:00,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:16:00,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:16:00,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:16:00,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:16:00,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:16:00,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:16:00,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:16:00,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:16:00,932 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:16:00,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:16:01,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5184542/176d6897f987440397ee7943d98e7a97/FLAG5cc912635 [2020-12-22 10:16:02,173 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:16:02,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:16:02,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5184542/176d6897f987440397ee7943d98e7a97/FLAG5cc912635 [2020-12-22 10:16:02,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5184542/176d6897f987440397ee7943d98e7a97 [2020-12-22 10:16:02,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:16:02,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:16:02,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:16:02,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:16:02,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:16:02,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:16:02" (1/1) ... [2020-12-22 10:16:02,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc71158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:02, skipping insertion in model container [2020-12-22 10:16:02,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:16:02" (1/1) ... [2020-12-22 10:16:02,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:16:02,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:16:03,029 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c[20572,20585] [2020-12-22 10:16:03,128 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c[27265,27278] [2020-12-22 10:16:04,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:16:04,133 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:16:04,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c[20572,20585] [2020-12-22 10:16:04,202 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c[27265,27278] [2020-12-22 10:16:04,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:16:04,984 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:16:04,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04 WrapperNode [2020-12-22 10:16:04,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:16:04,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:16:04,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:16:04,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:16:04,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:16:05,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:16:05,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:16:05,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:16:05,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:05,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... [2020-12-22 10:16:06,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:16:06,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:16:06,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:16:06,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:16:06,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:16:06,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:16:06,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:16:06,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:16:06,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:16:11,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:16:11,614 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:16:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:11 BoogieIcfgContainer [2020-12-22 10:16:11,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:16:11,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:16:11,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:16:11,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:16:11,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:16:02" (1/3) ... [2020-12-22 10:16:11,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf8ac2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:11, skipping insertion in model container [2020-12-22 10:16:11,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:04" (2/3) ... [2020-12-22 10:16:11,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf8ac2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:11, skipping insertion in model container [2020-12-22 10:16:11,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:11" (3/3) ... [2020-12-22 10:16:11,633 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:16:11,641 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:16:11,647 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:16:11,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:16:11,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:16:11,719 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:16:11,719 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:16:11,719 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:16:11,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:16:11,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:16:11,720 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:16:11,720 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:16:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:16:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:11,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:11,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:11,779 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:16:11,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:11,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935978782] [2020-12-22 10:16:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,071 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 10:16:12,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935978782] [2020-12-22 10:16:12,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:12,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128901959] [2020-12-22 10:16:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:16:12,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:16:12,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:16:12,098 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:16:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,192 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:16:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:16:12,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:16:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,238 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:16:12,239 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:16:12,250 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 10:16:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:16:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:16:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:16:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:16:12,382 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:16:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,383 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:16:12,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:16:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:16:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:12,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:12,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:16:12,391 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:16:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838599138] [2020-12-22 10:16:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,650 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 10:16:12,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838599138] [2020-12-22 10:16:12,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:16:12,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913744895] [2020-12-22 10:16:12,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:16:12,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:16:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:16:12,656 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:16:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,895 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:16:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:16:12,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:16:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,902 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:16:12,902 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:16:12,904 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 10:16:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:16:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:16:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:16:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:16:12,935 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:16:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,936 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:16:12,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:16:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:16:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:16:12,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:12,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:16:12,945 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1236816549, now seen corresponding path program 1 times [2020-12-22 10:16:12,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425858330] [2020-12-22 10:16:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:13,155 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 10:16:13,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425858330] [2020-12-22 10:16:13,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:13,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256758034] [2020-12-22 10:16:13,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:13,160 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:16:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:19,432 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:16:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:19,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 10:16:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:19,456 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:16:19,457 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:19,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2584 transitions. [2020-12-22 10:16:19,522 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2584 transitions. Word has length 60 [2020-12-22 10:16:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:19,524 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2584 transitions. [2020-12-22 10:16:19,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2584 transitions. [2020-12-22 10:16:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:19,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:19,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:19,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:16:19,526 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:16:19,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:19,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239774771] [2020-12-22 10:16:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:19,686 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 10:16:19,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239774771] [2020-12-22 10:16:19,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:19,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611207772] [2020-12-22 10:16:19,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:19,690 INFO L87 Difference]: Start difference. First operand 1630 states and 2584 transitions. Second operand 3 states. [2020-12-22 10:16:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:19,753 INFO L93 Difference]: Finished difference Result 1762 states and 2794 transitions. [2020-12-22 10:16:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:19,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:19,764 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:16:19,764 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:16:19,765 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 10:16:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:16:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:16:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:16:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2682 transitions. [2020-12-22 10:16:19,826 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2682 transitions. Word has length 91 [2020-12-22 10:16:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:19,827 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 2682 transitions. [2020-12-22 10:16:19,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2682 transitions. [2020-12-22 10:16:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:19,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:19,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:19,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:16:19,829 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:16:19,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:19,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544910325] [2020-12-22 10:16:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:19,931 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 10:16:19,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544910325] [2020-12-22 10:16:19,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:19,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515003191] [2020-12-22 10:16:19,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:19,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:19,934 INFO L87 Difference]: Start difference. First operand 1691 states and 2682 transitions. Second operand 3 states. [2020-12-22 10:16:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:19,988 INFO L93 Difference]: Finished difference Result 1939 states and 3078 transitions. [2020-12-22 10:16:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:19,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:19,999 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:16:19,999 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:16:20,001 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 10:16:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:16:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:16:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:16:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2867 transitions. [2020-12-22 10:16:20,065 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2867 transitions. Word has length 91 [2020-12-22 10:16:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:20,066 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 2867 transitions. [2020-12-22 10:16:20,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2867 transitions. [2020-12-22 10:16:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:20,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:20,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:20,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:16:20,068 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:16:20,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:20,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899710372] [2020-12-22 10:16:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:20,192 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 10:16:20,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899710372] [2020-12-22 10:16:20,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:20,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:20,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306376636] [2020-12-22 10:16:20,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:20,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:20,195 INFO L87 Difference]: Start difference. First operand 1807 states and 2867 transitions. Second operand 3 states. [2020-12-22 10:16:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:20,253 INFO L93 Difference]: Finished difference Result 2275 states and 3613 transitions. [2020-12-22 10:16:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:20,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:20,266 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:16:20,266 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:16:20,268 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 10:16:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:16:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:16:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:16:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3215 transitions. [2020-12-22 10:16:20,332 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3215 transitions. Word has length 91 [2020-12-22 10:16:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:20,333 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3215 transitions. [2020-12-22 10:16:20,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3215 transitions. [2020-12-22 10:16:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:20,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:16:20,335 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:16:20,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:20,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036930783] [2020-12-22 10:16:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:20,429 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 10:16:20,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036930783] [2020-12-22 10:16:20,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:20,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:20,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998976435] [2020-12-22 10:16:20,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:20,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:20,433 INFO L87 Difference]: Start difference. First operand 2027 states and 3215 transitions. Second operand 3 states. [2020-12-22 10:16:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:20,510 INFO L93 Difference]: Finished difference Result 2911 states and 4617 transitions. [2020-12-22 10:16:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:20,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:20,525 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:16:20,526 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:16:20,528 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 10:16:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:16:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:16:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:16:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3867 transitions. [2020-12-22 10:16:20,611 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3867 transitions. Word has length 91 [2020-12-22 10:16:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:20,611 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 3867 transitions. [2020-12-22 10:16:20,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3867 transitions. [2020-12-22 10:16:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:20,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:20,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:16:20,613 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:16:20,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:20,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93349086] [2020-12-22 10:16:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:20,702 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 10:16:20,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93349086] [2020-12-22 10:16:20,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:20,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170615010] [2020-12-22 10:16:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:20,705 INFO L87 Difference]: Start difference. First operand 2443 states and 3867 transitions. Second operand 3 states. [2020-12-22 10:16:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:20,807 INFO L93 Difference]: Finished difference Result 4111 states and 6493 transitions. [2020-12-22 10:16:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:20,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:20,825 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:16:20,825 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:16:20,828 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 10:16:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:16:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:16:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:16:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5083 transitions. [2020-12-22 10:16:20,959 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5083 transitions. Word has length 91 [2020-12-22 10:16:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:20,959 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5083 transitions. [2020-12-22 10:16:20,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5083 transitions. [2020-12-22 10:16:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:20,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:20,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:20,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:16:20,961 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:20,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:16:20,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:20,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54751902] [2020-12-22 10:16:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:21,149 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 10:16:21,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54751902] [2020-12-22 10:16:21,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:21,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:21,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569966011] [2020-12-22 10:16:21,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:21,154 INFO L87 Difference]: Start difference. First operand 3227 states and 5083 transitions. Second operand 9 states. [2020-12-22 10:16:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:22,625 INFO L93 Difference]: Finished difference Result 26551 states and 41609 transitions. [2020-12-22 10:16:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:16:22,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:16:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:22,740 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:16:22,741 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:16:22,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:16:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:16:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:16:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:16:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 7627 transitions. [2020-12-22 10:16:23,312 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 7627 transitions. Word has length 91 [2020-12-22 10:16:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:23,313 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 7627 transitions. [2020-12-22 10:16:23,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 7627 transitions. [2020-12-22 10:16:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:23,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:23,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:23,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:16:23,316 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:16:23,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:23,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586853220] [2020-12-22 10:16:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:23,433 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 10:16:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586853220] [2020-12-22 10:16:23,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996042] [2020-12-22 10:16:23,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:23,438 INFO L87 Difference]: Start difference. First operand 4891 states and 7627 transitions. Second operand 3 states. [2020-12-22 10:16:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:23,864 INFO L93 Difference]: Finished difference Result 11199 states and 17325 transitions. [2020-12-22 10:16:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:23,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:23,887 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:16:23,887 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:16:23,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:16:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:16:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11947 transitions. [2020-12-22 10:16:24,333 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11947 transitions. Word has length 93 [2020-12-22 10:16:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:24,333 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11947 transitions. [2020-12-22 10:16:24,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11947 transitions. [2020-12-22 10:16:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:24,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:24,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:24,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:16:24,338 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:16:24,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:24,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707282150] [2020-12-22 10:16:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:24,791 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 10:16:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707282150] [2020-12-22 10:16:24,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:24,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189153807] [2020-12-22 10:16:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:24,796 INFO L87 Difference]: Start difference. First operand 7803 states and 11947 transitions. Second operand 9 states. [2020-12-22 10:16:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:25,610 INFO L93 Difference]: Finished difference Result 14047 states and 21421 transitions. [2020-12-22 10:16:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:25,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:16:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:25,629 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:16:25,629 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:16:25,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:16:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:16:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:16:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11883 transitions. [2020-12-22 10:16:26,075 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11883 transitions. Word has length 93 [2020-12-22 10:16:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:26,075 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11883 transitions. [2020-12-22 10:16:26,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11883 transitions. [2020-12-22 10:16:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:26,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:26,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:26,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:16:26,077 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:16:26,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:26,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112017771] [2020-12-22 10:16:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:26,187 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 10:16:26,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112017771] [2020-12-22 10:16:26,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:26,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:26,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186148701] [2020-12-22 10:16:26,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:26,190 INFO L87 Difference]: Start difference. First operand 7803 states and 11883 transitions. Second operand 3 states. [2020-12-22 10:16:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:26,900 INFO L93 Difference]: Finished difference Result 19519 states and 29421 transitions. [2020-12-22 10:16:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:26,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:26,928 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:16:26,928 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:16:26,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:16:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:16:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:16:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 19883 transitions. [2020-12-22 10:16:27,698 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 19883 transitions. Word has length 93 [2020-12-22 10:16:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:27,699 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 19883 transitions. [2020-12-22 10:16:27,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 19883 transitions. [2020-12-22 10:16:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:16:27,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:27,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:27,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:16:27,701 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:16:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:27,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66846228] [2020-12-22 10:16:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:27,850 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 10:16:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66846228] [2020-12-22 10:16:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:16:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729004258] [2020-12-22 10:16:27,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:16:27,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:16:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:16:27,853 INFO L87 Difference]: Start difference. First operand 13275 states and 19883 transitions. Second operand 8 states. [2020-12-22 10:16:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:29,521 INFO L93 Difference]: Finished difference Result 22017 states and 32667 transitions. [2020-12-22 10:16:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:16:29,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:16:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:29,562 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:16:29,563 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:16:29,571 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 10:16:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:16:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:16:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:16:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20203 transitions. [2020-12-22 10:16:30,768 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20203 transitions. Word has length 94 [2020-12-22 10:16:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:30,768 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20203 transitions. [2020-12-22 10:16:30,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:16:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20203 transitions. [2020-12-22 10:16:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:16:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:30,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:30,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:16:30,770 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:16:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:30,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152082326] [2020-12-22 10:16:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:30,835 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 10:16:30,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152082326] [2020-12-22 10:16:30,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:30,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:30,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805116102] [2020-12-22 10:16:30,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:30,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:30,838 INFO L87 Difference]: Start difference. First operand 13659 states and 20203 transitions. Second operand 3 states. [2020-12-22 10:16:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:31,813 INFO L93 Difference]: Finished difference Result 25954 states and 38385 transitions. [2020-12-22 10:16:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:31,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:16:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:31,854 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:16:31,854 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:16:31,868 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 10:16:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:16:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:16:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:16:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28333 transitions. [2020-12-22 10:16:33,257 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28333 transitions. Word has length 95 [2020-12-22 10:16:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:33,258 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28333 transitions. [2020-12-22 10:16:33,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28333 transitions. [2020-12-22 10:16:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:33,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:33,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:33,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:16:33,270 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:33,270 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:16:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:33,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732092321] [2020-12-22 10:16:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:33,450 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 10:16:33,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732092321] [2020-12-22 10:16:33,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:33,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250915526] [2020-12-22 10:16:33,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:33,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:33,453 INFO L87 Difference]: Start difference. First operand 19293 states and 28333 transitions. Second operand 9 states. [2020-12-22 10:16:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:39,868 INFO L93 Difference]: Finished difference Result 146861 states and 214197 transitions. [2020-12-22 10:16:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:39,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:40,191 INFO L225 Difference]: With dead ends: 146861 [2020-12-22 10:16:40,192 INFO L226 Difference]: Without dead ends: 129131 [2020-12-22 10:16:40,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129131 states. [2020-12-22 10:16:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129131 to 37021. [2020-12-22 10:16:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37021 states. [2020-12-22 10:16:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37021 states to 37021 states and 53997 transitions. [2020-12-22 10:16:43,599 INFO L78 Accepts]: Start accepts. Automaton has 37021 states and 53997 transitions. Word has length 129 [2020-12-22 10:16:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:43,600 INFO L481 AbstractCegarLoop]: Abstraction has 37021 states and 53997 transitions. [2020-12-22 10:16:43,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37021 states and 53997 transitions. [2020-12-22 10:16:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:43,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:43,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:43,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:16:43,615 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:16:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:43,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046627027] [2020-12-22 10:16:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:43,938 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 10:16:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046627027] [2020-12-22 10:16:43,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:43,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:43,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189297323] [2020-12-22 10:16:43,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:43,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:43,940 INFO L87 Difference]: Start difference. First operand 37021 states and 53997 transitions. Second operand 9 states. [2020-12-22 10:16:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:52,686 INFO L93 Difference]: Finished difference Result 164589 states and 239861 transitions. [2020-12-22 10:16:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:52,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:52,885 INFO L225 Difference]: With dead ends: 164589 [2020-12-22 10:16:52,886 INFO L226 Difference]: Without dead ends: 146859 [2020-12-22 10:16:52,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146859 states. [2020-12-22 10:16:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146859 to 63645. [2020-12-22 10:16:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63645 states. [2020-12-22 10:16:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63645 states to 63645 states and 92333 transitions. [2020-12-22 10:16:57,982 INFO L78 Accepts]: Start accepts. Automaton has 63645 states and 92333 transitions. Word has length 129 [2020-12-22 10:16:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 63645 states and 92333 transitions. [2020-12-22 10:16:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 63645 states and 92333 transitions. [2020-12-22 10:16:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:57,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:57,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:57,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:16:57,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:16:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:58,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107747461] [2020-12-22 10:16:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:58,172 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 10:16:58,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107747461] [2020-12-22 10:16:58,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:58,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:58,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078102064] [2020-12-22 10:16:58,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:58,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:58,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:58,174 INFO L87 Difference]: Start difference. First operand 63645 states and 92333 transitions. Second operand 9 states. [2020-12-22 10:17:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:08,201 INFO L93 Difference]: Finished difference Result 182317 states and 265525 transitions. [2020-12-22 10:17:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:08,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:08,600 INFO L225 Difference]: With dead ends: 182317 [2020-12-22 10:17:08,600 INFO L226 Difference]: Without dead ends: 164587 [2020-12-22 10:17:08,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164587 states. [2020-12-22 10:17:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164587 to 81373. [2020-12-22 10:17:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81373 states. [2020-12-22 10:17:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81373 states to 81373 states and 117997 transitions. [2020-12-22 10:17:15,005 INFO L78 Accepts]: Start accepts. Automaton has 81373 states and 117997 transitions. Word has length 129 [2020-12-22 10:17:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:15,006 INFO L481 AbstractCegarLoop]: Abstraction has 81373 states and 117997 transitions. [2020-12-22 10:17:15,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 81373 states and 117997 transitions. [2020-12-22 10:17:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:15,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:15,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:15,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:17:15,023 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:17:15,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:15,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943086115] [2020-12-22 10:17:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:15,205 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 10:17:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943086115] [2020-12-22 10:17:15,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:15,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438469597] [2020-12-22 10:17:15,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:15,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:15,207 INFO L87 Difference]: Start difference. First operand 81373 states and 117997 transitions. Second operand 9 states. [2020-12-22 10:17:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:27,386 INFO L93 Difference]: Finished difference Result 200045 states and 291189 transitions. [2020-12-22 10:17:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:27,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:27,657 INFO L225 Difference]: With dead ends: 200045 [2020-12-22 10:17:27,658 INFO L226 Difference]: Without dead ends: 182315 [2020-12-22 10:17:27,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182315 states. [2020-12-22 10:17:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182315 to 99101. [2020-12-22 10:17:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99101 states. [2020-12-22 10:17:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99101 states to 99101 states and 143661 transitions. [2020-12-22 10:17:35,926 INFO L78 Accepts]: Start accepts. Automaton has 99101 states and 143661 transitions. Word has length 129 [2020-12-22 10:17:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:35,927 INFO L481 AbstractCegarLoop]: Abstraction has 99101 states and 143661 transitions. [2020-12-22 10:17:35,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 99101 states and 143661 transitions. [2020-12-22 10:17:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:35,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:35,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:17:35,946 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:17:35,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:35,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120095530] [2020-12-22 10:17:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:17:36,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120095530] [2020-12-22 10:17:36,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:36,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:36,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385169438] [2020-12-22 10:17:36,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:36,341 INFO L87 Difference]: Start difference. First operand 99101 states and 143661 transitions. Second operand 9 states. [2020-12-22 10:17:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:51,132 INFO L93 Difference]: Finished difference Result 217773 states and 316853 transitions. [2020-12-22 10:17:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:51,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:51,455 INFO L225 Difference]: With dead ends: 217773 [2020-12-22 10:17:51,455 INFO L226 Difference]: Without dead ends: 200043 [2020-12-22 10:17:51,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200043 states. [2020-12-22 10:18:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200043 to 116829. [2020-12-22 10:18:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116829 states. [2020-12-22 10:18:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116829 states to 116829 states and 169325 transitions. [2020-12-22 10:18:01,596 INFO L78 Accepts]: Start accepts. Automaton has 116829 states and 169325 transitions. Word has length 129 [2020-12-22 10:18:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 116829 states and 169325 transitions. [2020-12-22 10:18:01,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 116829 states and 169325 transitions. [2020-12-22 10:18:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:01,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:01,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:01,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:18:01,609 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:01,610 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:18:01,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:01,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652381459] [2020-12-22 10:18:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:18:01,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652381459] [2020-12-22 10:18:01,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:01,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127831981] [2020-12-22 10:18:01,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:01,798 INFO L87 Difference]: Start difference. First operand 116829 states and 169325 transitions. Second operand 9 states. [2020-12-22 10:18:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:19,824 INFO L93 Difference]: Finished difference Result 235501 states and 342517 transitions. [2020-12-22 10:18:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:19,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:20,182 INFO L225 Difference]: With dead ends: 235501 [2020-12-22 10:18:20,182 INFO L226 Difference]: Without dead ends: 217771 [2020-12-22 10:18:20,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217771 states. [2020-12-22 10:18:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217771 to 134557. [2020-12-22 10:18:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134557 states. [2020-12-22 10:18:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134557 states to 134557 states and 194989 transitions. [2020-12-22 10:18:33,055 INFO L78 Accepts]: Start accepts. Automaton has 134557 states and 194989 transitions. Word has length 129 [2020-12-22 10:18:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:33,056 INFO L481 AbstractCegarLoop]: Abstraction has 134557 states and 194989 transitions. [2020-12-22 10:18:33,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 134557 states and 194989 transitions. [2020-12-22 10:18:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:33,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:33,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:33,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:18:33,086 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:18:33,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:33,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626916231] [2020-12-22 10:18:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:33,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626916231] [2020-12-22 10:18:33,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:33,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930063549] [2020-12-22 10:18:33,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:33,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:33,215 INFO L87 Difference]: Start difference. First operand 134557 states and 194989 transitions. Second operand 3 states. [2020-12-22 10:18:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:41,577 INFO L93 Difference]: Finished difference Result 226758 states and 329436 transitions. [2020-12-22 10:18:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:41,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:18:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:41,691 INFO L225 Difference]: With dead ends: 226758 [2020-12-22 10:18:41,692 INFO L226 Difference]: Without dead ends: 93764 [2020-12-22 10:18:41,744 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 10:18:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93764 states. [2020-12-22 10:18:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93764 to 93762. [2020-12-22 10:18:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93762 states. [2020-12-22 10:18:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93762 states to 93762 states and 135961 transitions. [2020-12-22 10:18:50,035 INFO L78 Accepts]: Start accepts. Automaton has 93762 states and 135961 transitions. Word has length 131 [2020-12-22 10:18:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:50,035 INFO L481 AbstractCegarLoop]: Abstraction has 93762 states and 135961 transitions. [2020-12-22 10:18:50,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 93762 states and 135961 transitions. [2020-12-22 10:18:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:50,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:50,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:50,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:18:50,047 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:18:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:50,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893934812] [2020-12-22 10:18:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:18:50,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893934812] [2020-12-22 10:18:50,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:50,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225977794] [2020-12-22 10:18:50,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:50,228 INFO L87 Difference]: Start difference. First operand 93762 states and 135961 transitions. Second operand 9 states. [2020-12-22 10:19:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:06,111 INFO L93 Difference]: Finished difference Result 179794 states and 261409 transitions. [2020-12-22 10:19:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:06,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:19:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:06,514 INFO L225 Difference]: With dead ends: 179794 [2020-12-22 10:19:06,514 INFO L226 Difference]: Without dead ends: 167504 [2020-12-22 10:19:06,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167504 states. [2020-12-22 10:19:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167504 to 106050. [2020-12-22 10:19:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106050 states. [2020-12-22 10:19:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106050 states to 106050 states and 153753 transitions. [2020-12-22 10:19:17,212 INFO L78 Accepts]: Start accepts. Automaton has 106050 states and 153753 transitions. Word has length 131 [2020-12-22 10:19:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:17,213 INFO L481 AbstractCegarLoop]: Abstraction has 106050 states and 153753 transitions. [2020-12-22 10:19:17,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 106050 states and 153753 transitions. [2020-12-22 10:19:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:17,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:17,227 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] [2020-12-22 10:19:17,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:19:17,227 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:19:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:17,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603716569] [2020-12-22 10:19:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:17,527 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 10:19:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:17,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603716569] [2020-12-22 10:19:17,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:17,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:17,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126084600] [2020-12-22 10:19:17,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:17,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:17,550 INFO L87 Difference]: Start difference. First operand 106050 states and 153753 transitions. Second operand 3 states. [2020-12-22 10:19:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:22,630 INFO L93 Difference]: Finished difference Result 158278 states and 229371 transitions. [2020-12-22 10:19:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:22,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:19:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:22,689 INFO L225 Difference]: With dead ends: 158278 [2020-12-22 10:19:22,689 INFO L226 Difference]: Without dead ends: 53828 [2020-12-22 10:19:22,733 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 10:19:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53828 states. [2020-12-22 10:19:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53828 to 53826. [2020-12-22 10:19:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53826 states. [2020-12-22 10:19:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53826 states to 53826 states and 77593 transitions. [2020-12-22 10:19:27,981 INFO L78 Accepts]: Start accepts. Automaton has 53826 states and 77593 transitions. Word has length 132 [2020-12-22 10:19:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:27,981 INFO L481 AbstractCegarLoop]: Abstraction has 53826 states and 77593 transitions. [2020-12-22 10:19:27,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 53826 states and 77593 transitions. [2020-12-22 10:19:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:27,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:27,988 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:19:27,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:19:27,988 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:27,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:19:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969367493] [2020-12-22 10:19:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969367493] [2020-12-22 10:19:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406901251] [2020-12-22 10:19:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:19:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:19:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:19:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:19:28,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:19:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:19:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862343619] [2020-12-22 10:19:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:19:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:19:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:19:28,781 INFO L87 Difference]: Start difference. First operand 53826 states and 77593 transitions. Second operand 12 states.