/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.BOUNDED-14.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:13:07,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:13:07,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:13:07,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:13:07,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:13:07,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:13:07,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:13:07,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:13:07,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:13:07,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:13:07,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:13:07,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:13:07,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:13:07,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:13:07,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:13:07,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:13:07,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:13:07,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:13:07,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:13:07,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:13:07,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:13:07,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:13:07,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:13:07,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:13:07,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:13:07,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:13:07,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:13:07,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:13:07,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:13:07,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:13:07,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:13:07,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:13:07,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:13:07,453 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:13:07,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:13:07,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:13:07,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:13:07,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:13:07,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:13:07,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:13:07,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:13:07,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:13:07,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:13:07,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:13:07,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:13:07,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:13:07,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:07,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:13:07,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:13:07,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:13:07,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:13:07,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:13:07,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:13:07,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:13:07,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:13:07,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:13:07,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:13:07,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:13:07,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:13:07,923 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:13:07,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2020-12-22 10:13:08,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ee98ddb/9b1a488c5c4341f6aa43f4b9bf95dd4a/FLAGa7394596a [2020-12-22 10:13:09,161 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:13:09,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2020-12-22 10:13:09,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ee98ddb/9b1a488c5c4341f6aa43f4b9bf95dd4a/FLAGa7394596a [2020-12-22 10:13:09,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ee98ddb/9b1a488c5c4341f6aa43f4b9bf95dd4a [2020-12-22 10:13:09,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:13:09,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:13:09,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:09,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:13:09,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:13:09,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:09" (1/1) ... [2020-12-22 10:13:09,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8921a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:09, skipping insertion in model container [2020-12-22 10:13:09,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:09" (1/1) ... [2020-12-22 10:13:09,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:13:09,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:13:10,215 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.BOUNDED-14.pals+Problem12_label03.c[20544,20557] [2020-12-22 10:13:10,261 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.BOUNDED-14.pals+Problem12_label03.c[22638,22651] [2020-12-22 10:13:11,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:11,233 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:13:11,299 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.BOUNDED-14.pals+Problem12_label03.c[20544,20557] [2020-12-22 10:13:11,304 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.BOUNDED-14.pals+Problem12_label03.c[22638,22651] [2020-12-22 10:13:11,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:12,031 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:13:12,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12 WrapperNode [2020-12-22 10:13:12,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:12,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:12,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:13:12,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:13:12,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:12,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:12,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:12,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:13:12,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:13:12,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:13:12,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:12,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:12,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:12,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:13,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:13,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:13,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (1/1) ... [2020-12-22 10:13:13,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:13:13,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:13:13,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:13:13,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:13:13,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (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 10:13:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:13:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:13:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:13:13,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:13:18,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:13:18,914 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:13:18,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:18 BoogieIcfgContainer [2020-12-22 10:13:18,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:13:18,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:13:18,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:13:18,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:13:18,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:13:09" (1/3) ... [2020-12-22 10:13:18,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9512b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:18, skipping insertion in model container [2020-12-22 10:13:18,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:12" (2/3) ... [2020-12-22 10:13:18,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9512b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:18, skipping insertion in model container [2020-12-22 10:13:18,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:18" (3/3) ... [2020-12-22 10:13:18,933 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2020-12-22 10:13:18,944 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:13:18,950 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:13:18,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:13:19,027 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:13:19,032 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:13:19,032 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:13:19,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:13:19,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:13:19,033 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:13:19,033 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:13:19,033 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:13:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:13:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:13:19,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:19,095 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] [2020-12-22 10:13:19,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1744659899, now seen corresponding path program 1 times [2020-12-22 10:13:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:19,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725855767] [2020-12-22 10:13:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:19,524 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 10:13:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725855767] [2020-12-22 10:13:19,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:19,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162277223] [2020-12-22 10:13:19,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:19,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:19,550 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 3 states. [2020-12-22 10:13:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:25,805 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2020-12-22 10:13:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:25,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 10:13:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:25,857 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:13:25,859 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:25,871 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 10:13:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2560 transitions. [2020-12-22 10:13:26,023 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2560 transitions. Word has length 20 [2020-12-22 10:13:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:26,024 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2560 transitions. [2020-12-22 10:13:26,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2560 transitions. [2020-12-22 10:13:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:26,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:26,030 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 10:13:26,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:13:26,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:13:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715115243] [2020-12-22 10:13:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:26,216 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 10:13:26,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715115243] [2020-12-22 10:13:26,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:26,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:26,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336781738] [2020-12-22 10:13:26,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:13:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:13:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:13:26,221 INFO L87 Difference]: Start difference. First operand 1629 states and 2560 transitions. Second operand 5 states. [2020-12-22 10:13:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:26,349 INFO L93 Difference]: Finished difference Result 1701 states and 2672 transitions. [2020-12-22 10:13:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:13:26,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:13:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:26,360 INFO L225 Difference]: With dead ends: 1701 [2020-12-22 10:13:26,360 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:26,363 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 10:13:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2510 transitions. [2020-12-22 10:13:26,412 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2510 transitions. Word has length 42 [2020-12-22 10:13:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:26,413 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2510 transitions. [2020-12-22 10:13:26,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:13:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2510 transitions. [2020-12-22 10:13:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:26,426 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 10:13:26,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:13:26,426 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:13:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183187068] [2020-12-22 10:13:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:26,636 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 10:13:26,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183187068] [2020-12-22 10:13:26,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:26,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220993377] [2020-12-22 10:13:26,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:26,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:26,639 INFO L87 Difference]: Start difference. First operand 1629 states and 2510 transitions. Second operand 3 states. [2020-12-22 10:13:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:26,683 INFO L93 Difference]: Finished difference Result 1759 states and 2716 transitions. [2020-12-22 10:13:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:26,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:26,694 INFO L225 Difference]: With dead ends: 1759 [2020-12-22 10:13:26,694 INFO L226 Difference]: Without dead ends: 1691 [2020-12-22 10:13:26,695 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 10:13:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-12-22 10:13:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2020-12-22 10:13:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-12-22 10:13:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2606 transitions. [2020-12-22 10:13:26,742 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2606 transitions. Word has length 91 [2020-12-22 10:13:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:26,743 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 2606 transitions. [2020-12-22 10:13:26,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2606 transitions. [2020-12-22 10:13:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:26,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:26,745 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 10:13:26,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:13:26,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:26,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:13:26,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:26,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781178595] [2020-12-22 10:13:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:26,841 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 10:13:26,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781178595] [2020-12-22 10:13:26,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:26,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709767165] [2020-12-22 10:13:26,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:26,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:26,844 INFO L87 Difference]: Start difference. First operand 1689 states and 2606 transitions. Second operand 3 states. [2020-12-22 10:13:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:26,892 INFO L93 Difference]: Finished difference Result 1933 states and 2994 transitions. [2020-12-22 10:13:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:26,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:26,903 INFO L225 Difference]: With dead ends: 1933 [2020-12-22 10:13:26,903 INFO L226 Difference]: Without dead ends: 1805 [2020-12-22 10:13:26,905 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 10:13:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-12-22 10:13:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2020-12-22 10:13:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2020-12-22 10:13:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2787 transitions. [2020-12-22 10:13:26,952 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2787 transitions. Word has length 91 [2020-12-22 10:13:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:26,953 INFO L481 AbstractCegarLoop]: Abstraction has 1803 states and 2787 transitions. [2020-12-22 10:13:26,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2787 transitions. [2020-12-22 10:13:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:26,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:26,955 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 10:13:26,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:13:26,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:13:26,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:26,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492318604] [2020-12-22 10:13:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:27,036 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 10:13:27,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492318604] [2020-12-22 10:13:27,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:27,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408057484] [2020-12-22 10:13:27,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:27,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:27,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:27,042 INFO L87 Difference]: Start difference. First operand 1803 states and 2787 transitions. Second operand 3 states. [2020-12-22 10:13:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:27,107 INFO L93 Difference]: Finished difference Result 2263 states and 3517 transitions. [2020-12-22 10:13:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:27,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:27,121 INFO L225 Difference]: With dead ends: 2263 [2020-12-22 10:13:27,121 INFO L226 Difference]: Without dead ends: 2021 [2020-12-22 10:13:27,123 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 10:13:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-12-22 10:13:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2020-12-22 10:13:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2019 states. [2020-12-22 10:13:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3127 transitions. [2020-12-22 10:13:27,186 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3127 transitions. Word has length 91 [2020-12-22 10:13:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:27,187 INFO L481 AbstractCegarLoop]: Abstraction has 2019 states and 3127 transitions. [2020-12-22 10:13:27,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3127 transitions. [2020-12-22 10:13:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:27,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:27,189 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 10:13:27,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:13:27,189 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:27,190 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:13:27,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:27,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962381660] [2020-12-22 10:13:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:27,325 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 10:13:27,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962381660] [2020-12-22 10:13:27,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:27,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:27,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575274987] [2020-12-22 10:13:27,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:27,329 INFO L87 Difference]: Start difference. First operand 2019 states and 3127 transitions. Second operand 3 states. [2020-12-22 10:13:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:27,395 INFO L93 Difference]: Finished difference Result 2887 states and 4497 transitions. [2020-12-22 10:13:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:27,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:27,411 INFO L225 Difference]: With dead ends: 2887 [2020-12-22 10:13:27,411 INFO L226 Difference]: Without dead ends: 2429 [2020-12-22 10:13:27,413 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 10:13:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2020-12-22 10:13:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2020-12-22 10:13:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2020-12-22 10:13:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3763 transitions. [2020-12-22 10:13:27,500 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3763 transitions. Word has length 91 [2020-12-22 10:13:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:27,502 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 3763 transitions. [2020-12-22 10:13:27,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3763 transitions. [2020-12-22 10:13:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:27,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:27,503 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 10:13:27,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:13:27,505 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:27,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:13:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826905935] [2020-12-22 10:13:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:27,740 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 10:13:27,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826905935] [2020-12-22 10:13:27,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:27,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:27,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571268417] [2020-12-22 10:13:27,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:27,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:27,745 INFO L87 Difference]: Start difference. First operand 2427 states and 3763 transitions. Second operand 3 states. [2020-12-22 10:13:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:27,848 INFO L93 Difference]: Finished difference Result 4063 states and 6325 transitions. [2020-12-22 10:13:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:27,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:27,867 INFO L225 Difference]: With dead ends: 4063 [2020-12-22 10:13:27,867 INFO L226 Difference]: Without dead ends: 3197 [2020-12-22 10:13:27,872 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 10:13:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-12-22 10:13:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3195. [2020-12-22 10:13:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-12-22 10:13:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4947 transitions. [2020-12-22 10:13:28,013 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4947 transitions. Word has length 91 [2020-12-22 10:13:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:28,014 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 4947 transitions. [2020-12-22 10:13:28,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4947 transitions. [2020-12-22 10:13:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:28,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:28,016 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 10:13:28,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:13:28,016 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:13:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:28,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583856734] [2020-12-22 10:13:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:28,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583856734] [2020-12-22 10:13:28,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:28,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792081535] [2020-12-22 10:13:28,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:28,225 INFO L87 Difference]: Start difference. First operand 3195 states and 4947 transitions. Second operand 9 states. [2020-12-22 10:13:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:29,798 INFO L93 Difference]: Finished difference Result 26071 states and 40577 transitions. [2020-12-22 10:13:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:13:29,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:13:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:29,929 INFO L225 Difference]: With dead ends: 26071 [2020-12-22 10:13:29,929 INFO L226 Difference]: Without dead ends: 24437 [2020-12-22 10:13:29,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:13:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24437 states. [2020-12-22 10:13:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24437 to 4827. [2020-12-22 10:13:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4827 states. [2020-12-22 10:13:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 7427 transitions. [2020-12-22 10:13:30,529 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 7427 transitions. Word has length 91 [2020-12-22 10:13:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:30,530 INFO L481 AbstractCegarLoop]: Abstraction has 4827 states and 7427 transitions. [2020-12-22 10:13:30,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 7427 transitions. [2020-12-22 10:13:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:30,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:30,532 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:13:30,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:13:30,532 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1370507274, now seen corresponding path program 1 times [2020-12-22 10:13:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732400533] [2020-12-22 10:13:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732400533] [2020-12-22 10:13:30,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623172396] [2020-12-22 10:13:30,733 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 10:13:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:13:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:13:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:31,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:13:31,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:13:31,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197338301] [2020-12-22 10:13:31,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:31,106 INFO L87 Difference]: Start difference. First operand 4827 states and 7427 transitions. Second operand 3 states. [2020-12-22 10:13:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:37,188 INFO L93 Difference]: Finished difference Result 7833 states and 12114 transitions. [2020-12-22 10:13:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:37,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:37,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:37,204 INFO L225 Difference]: With dead ends: 7833 [2020-12-22 10:13:37,204 INFO L226 Difference]: Without dead ends: 6329 [2020-12-22 10:13:37,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2020-12-22 10:13:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6329. [2020-12-22 10:13:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6329 states. [2020-12-22 10:13:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 9205 transitions. [2020-12-22 10:13:37,478 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 9205 transitions. Word has length 91 [2020-12-22 10:13:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:37,478 INFO L481 AbstractCegarLoop]: Abstraction has 6329 states and 9205 transitions. [2020-12-22 10:13:37,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 9205 transitions. [2020-12-22 10:13:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:37,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:37,480 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 10:13:37,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 10:13:37,696 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:13:37,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:37,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365704410] [2020-12-22 10:13:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:37,769 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 10:13:37,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365704410] [2020-12-22 10:13:37,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:37,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:37,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172001868] [2020-12-22 10:13:37,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:37,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:37,772 INFO L87 Difference]: Start difference. First operand 6329 states and 9205 transitions. Second operand 3 states. [2020-12-22 10:13:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:38,062 INFO L93 Difference]: Finished difference Result 11151 states and 16617 transitions. [2020-12-22 10:13:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:38,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:38,079 INFO L225 Difference]: With dead ends: 11151 [2020-12-22 10:13:38,080 INFO L226 Difference]: Without dead ends: 7885 [2020-12-22 10:13:38,087 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 10:13:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2020-12-22 10:13:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 7883. [2020-12-22 10:13:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7883 states. [2020-12-22 10:13:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 11543 transitions. [2020-12-22 10:13:38,433 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 11543 transitions. Word has length 93 [2020-12-22 10:13:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:38,433 INFO L481 AbstractCegarLoop]: Abstraction has 7883 states and 11543 transitions. [2020-12-22 10:13:38,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 11543 transitions. [2020-12-22 10:13:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:38,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:38,434 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 10:13:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:13:38,435 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:13:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:38,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268723203] [2020-12-22 10:13:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:38,777 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 10:13:38,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268723203] [2020-12-22 10:13:38,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:38,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:38,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225783007] [2020-12-22 10:13:38,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:38,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:38,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:38,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:38,780 INFO L87 Difference]: Start difference. First operand 7883 states and 11543 transitions. Second operand 9 states. [2020-12-22 10:13:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:39,694 INFO L93 Difference]: Finished difference Result 12703 states and 18905 transitions. [2020-12-22 10:13:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:39,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:13:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:39,711 INFO L225 Difference]: With dead ends: 12703 [2020-12-22 10:13:39,712 INFO L226 Difference]: Without dead ends: 7885 [2020-12-22 10:13:39,720 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 10:13:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2020-12-22 10:13:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 7883. [2020-12-22 10:13:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7883 states. [2020-12-22 10:13:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 11495 transitions. [2020-12-22 10:13:40,051 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 11495 transitions. Word has length 93 [2020-12-22 10:13:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:40,051 INFO L481 AbstractCegarLoop]: Abstraction has 7883 states and 11495 transitions. [2020-12-22 10:13:40,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 11495 transitions. [2020-12-22 10:13:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:40,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:40,053 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 10:13:40,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:13:40,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:13:40,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:40,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721088258] [2020-12-22 10:13:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:40,147 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 10:13:40,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721088258] [2020-12-22 10:13:40,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:40,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:40,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666462905] [2020-12-22 10:13:40,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:40,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:40,153 INFO L87 Difference]: Start difference. First operand 7883 states and 11495 transitions. Second operand 3 states. [2020-12-22 10:13:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:40,632 INFO L93 Difference]: Finished difference Result 16943 states and 25161 transitions. [2020-12-22 10:13:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:40,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:40,660 INFO L225 Difference]: With dead ends: 16943 [2020-12-22 10:13:40,660 INFO L226 Difference]: Without dead ends: 12125 [2020-12-22 10:13:40,673 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 10:13:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12125 states. [2020-12-22 10:13:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12125 to 12123. [2020-12-22 10:13:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12123 states. [2020-12-22 10:13:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 17751 transitions. [2020-12-22 10:13:41,227 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 17751 transitions. Word has length 93 [2020-12-22 10:13:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:41,227 INFO L481 AbstractCegarLoop]: Abstraction has 12123 states and 17751 transitions. [2020-12-22 10:13:41,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 17751 transitions. [2020-12-22 10:13:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:41,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:41,229 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 10:13:41,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:13:41,229 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:13:41,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:41,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639510601] [2020-12-22 10:13:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:41,310 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 10:13:41,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639510601] [2020-12-22 10:13:41,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:41,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817823176] [2020-12-22 10:13:41,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:41,318 INFO L87 Difference]: Start difference. First operand 12123 states and 17751 transitions. Second operand 3 states. [2020-12-22 10:13:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:42,096 INFO L93 Difference]: Finished difference Result 29087 states and 42969 transitions. [2020-12-22 10:13:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:42,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:42,133 INFO L225 Difference]: With dead ends: 29087 [2020-12-22 10:13:42,133 INFO L226 Difference]: Without dead ends: 20029 [2020-12-22 10:13:42,147 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 10:13:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20029 states. [2020-12-22 10:13:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20029 to 20027. [2020-12-22 10:13:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20027 states. [2020-12-22 10:13:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 29207 transitions. [2020-12-22 10:13:43,000 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 29207 transitions. Word has length 93 [2020-12-22 10:13:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:43,000 INFO L481 AbstractCegarLoop]: Abstraction has 20027 states and 29207 transitions. [2020-12-22 10:13:43,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 29207 transitions. [2020-12-22 10:13:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:43,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:43,002 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 10:13:43,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:13:43,002 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:13:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:43,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122775055] [2020-12-22 10:13:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:43,111 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 10:13:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122775055] [2020-12-22 10:13:43,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:43,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:43,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826377757] [2020-12-22 10:13:43,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:43,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:43,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:43,115 INFO L87 Difference]: Start difference. First operand 20027 states and 29207 transitions. Second operand 6 states. [2020-12-22 10:13:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:44,492 INFO L93 Difference]: Finished difference Result 36989 states and 54232 transitions. [2020-12-22 10:13:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:44,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:44,524 INFO L225 Difference]: With dead ends: 36989 [2020-12-22 10:13:44,524 INFO L226 Difference]: Without dead ends: 20027 [2020-12-22 10:13:44,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2020-12-22 10:13:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 20027. [2020-12-22 10:13:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20027 states. [2020-12-22 10:13:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 28951 transitions. [2020-12-22 10:13:45,628 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 28951 transitions. Word has length 94 [2020-12-22 10:13:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:45,628 INFO L481 AbstractCegarLoop]: Abstraction has 20027 states and 28951 transitions. [2020-12-22 10:13:45,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 28951 transitions. [2020-12-22 10:13:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:45,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:45,631 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 10:13:45,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:13:45,631 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:13:45,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:45,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886491282] [2020-12-22 10:13:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:45,739 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 10:13:45,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886491282] [2020-12-22 10:13:45,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:45,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:45,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980319095] [2020-12-22 10:13:45,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:45,742 INFO L87 Difference]: Start difference. First operand 20027 states and 28951 transitions. Second operand 6 states. [2020-12-22 10:13:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:46,876 INFO L93 Difference]: Finished difference Result 36989 states and 53720 transitions. [2020-12-22 10:13:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:46,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:46,902 INFO L225 Difference]: With dead ends: 36989 [2020-12-22 10:13:46,902 INFO L226 Difference]: Without dead ends: 20027 [2020-12-22 10:13:46,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2020-12-22 10:13:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 20027. [2020-12-22 10:13:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20027 states. [2020-12-22 10:13:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 28759 transitions. [2020-12-22 10:13:47,861 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 28759 transitions. Word has length 94 [2020-12-22 10:13:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:47,861 INFO L481 AbstractCegarLoop]: Abstraction has 20027 states and 28759 transitions. [2020-12-22 10:13:47,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 28759 transitions. [2020-12-22 10:13:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:47,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:47,862 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 10:13:47,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:13:47,863 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:13:47,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:47,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499630866] [2020-12-22 10:13:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:47,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499630866] [2020-12-22 10:13:47,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:47,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:13:47,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48525672] [2020-12-22 10:13:47,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:13:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:13:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:13:47,996 INFO L87 Difference]: Start difference. First operand 20027 states and 28759 transitions. Second operand 8 states. [2020-12-22 10:13:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:50,588 INFO L93 Difference]: Finished difference Result 34526 states and 49409 transitions. [2020-12-22 10:13:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:13:50,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:13:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:50,628 INFO L225 Difference]: With dead ends: 34526 [2020-12-22 10:13:50,629 INFO L226 Difference]: Without dead ends: 34524 [2020-12-22 10:13:50,637 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 10:13:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34524 states. [2020-12-22 10:13:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34524 to 20795. [2020-12-22 10:13:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:13:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29463 transitions. [2020-12-22 10:13:51,894 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29463 transitions. Word has length 94 [2020-12-22 10:13:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:51,894 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 29463 transitions. [2020-12-22 10:13:51,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:13:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29463 transitions. [2020-12-22 10:13:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 10:13:51,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:51,896 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:13:51,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:13:51,896 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:51,897 INFO L82 PathProgramCache]: Analyzing trace with hash -630872807, now seen corresponding path program 1 times [2020-12-22 10:13:51,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:51,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159744597] [2020-12-22 10:13:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:52,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159744597] [2020-12-22 10:13:52,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:52,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:52,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731209284] [2020-12-22 10:13:52,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:13:52,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:52,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:13:52,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:13:52,002 INFO L87 Difference]: Start difference. First operand 20795 states and 29463 transitions. Second operand 4 states. [2020-12-22 10:14:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:02,776 INFO L93 Difference]: Finished difference Result 27556 states and 38505 transitions. [2020-12-22 10:14:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:14:02,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-12-22 10:14:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:02,801 INFO L225 Difference]: With dead ends: 27556 [2020-12-22 10:14:02,801 INFO L226 Difference]: Without dead ends: 24550 [2020-12-22 10:14:02,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:14:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24550 states. [2020-12-22 10:14:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24550 to 24550. [2020-12-22 10:14:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24550 states. [2020-12-22 10:14:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24550 states to 24550 states and 34221 transitions. [2020-12-22 10:14:04,119 INFO L78 Accepts]: Start accepts. Automaton has 24550 states and 34221 transitions. Word has length 97 [2020-12-22 10:14:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:04,120 INFO L481 AbstractCegarLoop]: Abstraction has 24550 states and 34221 transitions. [2020-12-22 10:14:04,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:14:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24550 states and 34221 transitions. [2020-12-22 10:14:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:04,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:04,134 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] [2020-12-22 10:14:04,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:14:04,135 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:14:04,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:04,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182463568] [2020-12-22 10:14:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:14:04,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182463568] [2020-12-22 10:14:04,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:04,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:04,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524476859] [2020-12-22 10:14:04,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:04,334 INFO L87 Difference]: Start difference. First operand 24550 states and 34221 transitions. Second operand 9 states. [2020-12-22 10:14:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:12,323 INFO L93 Difference]: Finished difference Result 152118 states and 215957 transitions. [2020-12-22 10:14:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:12,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:12,485 INFO L225 Difference]: With dead ends: 152118 [2020-12-22 10:14:12,485 INFO L226 Difference]: Without dead ends: 134388 [2020-12-22 10:14:12,719 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 10:14:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134388 states. [2020-12-22 10:14:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134388 to 42278. [2020-12-22 10:14:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42278 states. [2020-12-22 10:14:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42278 states to 42278 states and 59309 transitions. [2020-12-22 10:14:16,253 INFO L78 Accepts]: Start accepts. Automaton has 42278 states and 59309 transitions. Word has length 130 [2020-12-22 10:14:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:16,254 INFO L481 AbstractCegarLoop]: Abstraction has 42278 states and 59309 transitions. [2020-12-22 10:14:16,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42278 states and 59309 transitions. [2020-12-22 10:14:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:16,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:16,269 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] [2020-12-22 10:14:16,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:16,269 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:14:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:16,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956505180] [2020-12-22 10:14:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:14:16,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956505180] [2020-12-22 10:14:16,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:16,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224733398] [2020-12-22 10:14:16,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:16,447 INFO L87 Difference]: Start difference. First operand 42278 states and 59309 transitions. Second operand 9 states. [2020-12-22 10:14:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:26,728 INFO L93 Difference]: Finished difference Result 169846 states and 241045 transitions. [2020-12-22 10:14:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:26,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:26,926 INFO L225 Difference]: With dead ends: 169846 [2020-12-22 10:14:26,926 INFO L226 Difference]: Without dead ends: 152116 [2020-12-22 10:14:26,964 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 10:14:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152116 states. [2020-12-22 10:14:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152116 to 68902. [2020-12-22 10:14:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68902 states. [2020-12-22 10:14:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68902 states to 68902 states and 96781 transitions. [2020-12-22 10:14:33,057 INFO L78 Accepts]: Start accepts. Automaton has 68902 states and 96781 transitions. Word has length 130 [2020-12-22 10:14:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:33,057 INFO L481 AbstractCegarLoop]: Abstraction has 68902 states and 96781 transitions. [2020-12-22 10:14:33,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 68902 states and 96781 transitions. [2020-12-22 10:14:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:33,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:33,074 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, 1] [2020-12-22 10:14:33,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:33,074 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:14:33,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:33,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136901721] [2020-12-22 10:14:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:33,248 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 10:14:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136901721] [2020-12-22 10:14:33,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:33,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:33,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488241035] [2020-12-22 10:14:33,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:33,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:33,251 INFO L87 Difference]: Start difference. First operand 68902 states and 96781 transitions. Second operand 9 states. [2020-12-22 10:14:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:45,514 INFO L93 Difference]: Finished difference Result 187574 states and 266133 transitions. [2020-12-22 10:14:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:45,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:45,921 INFO L225 Difference]: With dead ends: 187574 [2020-12-22 10:14:45,921 INFO L226 Difference]: Without dead ends: 169844 [2020-12-22 10:14:45,969 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 10:14:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169844 states. [2020-12-22 10:14:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169844 to 86630. [2020-12-22 10:14:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86630 states. [2020-12-22 10:14:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86630 states to 86630 states and 121869 transitions. [2020-12-22 10:14:53,520 INFO L78 Accepts]: Start accepts. Automaton has 86630 states and 121869 transitions. Word has length 130 [2020-12-22 10:14:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:53,520 INFO L481 AbstractCegarLoop]: Abstraction has 86630 states and 121869 transitions. [2020-12-22 10:14:53,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 86630 states and 121869 transitions. [2020-12-22 10:14:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:53,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:53,538 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, 1] [2020-12-22 10:14:53,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:53,538 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:14:53,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:53,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458622792] [2020-12-22 10:14:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:14:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458622792] [2020-12-22 10:14:53,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:53,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607652091] [2020-12-22 10:14:53,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:53,743 INFO L87 Difference]: Start difference. First operand 86630 states and 121869 transitions. Second operand 9 states. [2020-12-22 10:15:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:08,833 INFO L93 Difference]: Finished difference Result 205302 states and 291221 transitions. [2020-12-22 10:15:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:08,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:09,284 INFO L225 Difference]: With dead ends: 205302 [2020-12-22 10:15:09,284 INFO L226 Difference]: Without dead ends: 187572 [2020-12-22 10:15:09,326 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 10:15:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187572 states. [2020-12-22 10:15:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187572 to 104358. [2020-12-22 10:15:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104358 states. [2020-12-22 10:15:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104358 states to 104358 states and 146957 transitions. [2020-12-22 10:15:18,974 INFO L78 Accepts]: Start accepts. Automaton has 104358 states and 146957 transitions. Word has length 130 [2020-12-22 10:15:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:18,975 INFO L481 AbstractCegarLoop]: Abstraction has 104358 states and 146957 transitions. [2020-12-22 10:15:18,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 104358 states and 146957 transitions. [2020-12-22 10:15:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:18,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:18,991 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, 1] [2020-12-22 10:15:18,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:18,991 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:15:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:18,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103751852] [2020-12-22 10:15:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:15:19,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103751852] [2020-12-22 10:15:19,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:19,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662148589] [2020-12-22 10:15:19,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:19,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:19,397 INFO L87 Difference]: Start difference. First operand 104358 states and 146957 transitions. Second operand 9 states. [2020-12-22 10:15:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:37,266 INFO L93 Difference]: Finished difference Result 223030 states and 316309 transitions. [2020-12-22 10:15:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:37,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:37,764 INFO L225 Difference]: With dead ends: 223030 [2020-12-22 10:15:37,764 INFO L226 Difference]: Without dead ends: 205300 [2020-12-22 10:15:37,812 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 10:15:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205300 states. [2020-12-22 10:15:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205300 to 122086. [2020-12-22 10:15:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122086 states. [2020-12-22 10:15:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122086 states to 122086 states and 172045 transitions. [2020-12-22 10:15:49,672 INFO L78 Accepts]: Start accepts. Automaton has 122086 states and 172045 transitions. Word has length 130 [2020-12-22 10:15:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:49,672 INFO L481 AbstractCegarLoop]: Abstraction has 122086 states and 172045 transitions. [2020-12-22 10:15:49,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 122086 states and 172045 transitions. [2020-12-22 10:15:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:49,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:49,687 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, 1] [2020-12-22 10:15:49,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:15:49,688 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:15:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:49,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238761306] [2020-12-22 10:15:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:15:49,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238761306] [2020-12-22 10:15:49,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:49,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:49,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757623757] [2020-12-22 10:15:49,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:49,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:49,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:49,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:49,878 INFO L87 Difference]: Start difference. First operand 122086 states and 172045 transitions. Second operand 9 states. [2020-12-22 10:16:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:11,482 INFO L93 Difference]: Finished difference Result 240758 states and 341397 transitions. [2020-12-22 10:16:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:11,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,016 INFO L225 Difference]: With dead ends: 240758 [2020-12-22 10:16:12,016 INFO L226 Difference]: Without dead ends: 223028 [2020-12-22 10:16:12,073 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 10:16:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223028 states.