/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:01:24,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:01:24,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:01:24,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:01:24,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:01:24,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:01:24,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:01:24,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:01:24,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:01:24,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:01:24,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:01:24,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:01:24,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:01:24,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:01:24,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:01:24,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:01:24,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:01:24,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:01:24,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:01:24,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:01:24,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:01:24,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:01:24,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:01:24,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:01:24,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:01:24,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:01:24,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:01:24,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:01:24,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:01:24,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:01:24,520 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:01:24,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:01:24,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:01:24,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:01:24,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:01:24,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:01:24,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:01:24,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:01:24,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:01:24,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:01:24,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:01:24,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:01:24,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:01:24,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:01:24,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:01:24,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:01:24,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:01:24,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:01:24,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:01:24,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:01:24,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:01:24,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:01:24,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:01:24,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:01:24,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:01:24,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:01:24,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:01:24,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:01:24,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:01:24,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:01:24,892 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:01:24,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-07-17 12:01:24,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a7308cb/fcb29b58bf2c42d9b616726f3f48d953/FLAGd1c005b98 [2020-07-17 12:01:25,538 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:01:25,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-07-17 12:01:25,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a7308cb/fcb29b58bf2c42d9b616726f3f48d953/FLAGd1c005b98 [2020-07-17 12:01:25,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a7308cb/fcb29b58bf2c42d9b616726f3f48d953 [2020-07-17 12:01:25,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:01:25,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:01:25,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:25,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:01:25,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:01:25,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:25,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81141c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25, skipping insertion in model container [2020-07-17 12:01:25,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:25,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:01:25,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:01:26,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:26,175 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:01:26,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:26,220 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:01:26,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26 WrapperNode [2020-07-17 12:01:26,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:26,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:01:26,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:01:26,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:01:26,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (1/1) ... [2020-07-17 12:01:26,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:01:26,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:01:26,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:01:26,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:01:26,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (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 [2020-07-17 12:01:26,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:01:26,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:01:26,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:01:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:01:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:01:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:01:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:01:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:01:26,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:01:26,783 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:01:26,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:26 BoogieIcfgContainer [2020-07-17 12:01:26,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:01:26,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:01:26,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:01:26,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:01:26,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:01:25" (1/3) ... [2020-07-17 12:01:26,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc6e389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:26, skipping insertion in model container [2020-07-17 12:01:26,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:26" (2/3) ... [2020-07-17 12:01:26,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc6e389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:26, skipping insertion in model container [2020-07-17 12:01:26,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:26" (3/3) ... [2020-07-17 12:01:26,803 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-07-17 12:01:26,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:01:26,826 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:01:26,843 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:01:26,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:01:26,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:01:26,873 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:01:26,873 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:01:26,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:01:26,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:01:26,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:01:26,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:01:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-17 12:01:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:01:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:26,907 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] [2020-07-17 12:01:26,908 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-07-17 12:01:26,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:26,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506545898] [2020-07-17 12:01:26,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506545898] [2020-07-17 12:01:27,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651350981] [2020-07-17 12:01:27,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,186 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-07-17 12:01:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,291 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-07-17 12:01:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:01:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,307 INFO L225 Difference]: With dead ends: 93 [2020-07-17 12:01:27,307 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 12:01:27,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 12:01:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-07-17 12:01:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 12:01:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-07-17 12:01:27,359 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-07-17 12:01:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,360 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-07-17 12:01:27,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-07-17 12:01:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:01:27,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,362 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] [2020-07-17 12:01:27,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:01:27,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-07-17 12:01:27,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104865204] [2020-07-17 12:01:27,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104865204] [2020-07-17 12:01:27,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438402708] [2020-07-17 12:01:27,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,474 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-07-17 12:01:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,524 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-07-17 12:01:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:01:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,527 INFO L225 Difference]: With dead ends: 127 [2020-07-17 12:01:27,527 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 12:01:27,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 12:01:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-17 12:01:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-17 12:01:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-07-17 12:01:27,541 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-07-17 12:01:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,542 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-07-17 12:01:27,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-07-17 12:01:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,544 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] [2020-07-17 12:01:27,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:01:27,545 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-07-17 12:01:27,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223040360] [2020-07-17 12:01:27,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223040360] [2020-07-17 12:01:27,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955876528] [2020-07-17 12:01:27,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,610 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-07-17 12:01:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,637 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-17 12:01:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,639 INFO L225 Difference]: With dead ends: 117 [2020-07-17 12:01:27,640 INFO L226 Difference]: Without dead ends: 81 [2020-07-17 12:01:27,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-17 12:01:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-07-17 12:01:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-17 12:01:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-07-17 12:01:27,654 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-07-17 12:01:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,655 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-07-17 12:01:27,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-07-17 12:01:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,656 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] [2020-07-17 12:01:27,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:01:27,657 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-07-17 12:01:27,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954109817] [2020-07-17 12:01:27,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954109817] [2020-07-17 12:01:27,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517041913] [2020-07-17 12:01:27,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,706 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-07-17 12:01:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,728 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-07-17 12:01:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,731 INFO L225 Difference]: With dead ends: 148 [2020-07-17 12:01:27,731 INFO L226 Difference]: Without dead ends: 146 [2020-07-17 12:01:27,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-17 12:01:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-07-17 12:01:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-17 12:01:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-07-17 12:01:27,746 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-07-17 12:01:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,747 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-07-17 12:01:27,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-07-17 12:01:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,749 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] [2020-07-17 12:01:27,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:01:27,749 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-07-17 12:01:27,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129517738] [2020-07-17 12:01:27,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129517738] [2020-07-17 12:01:27,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058168059] [2020-07-17 12:01:27,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,831 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-07-17 12:01:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,880 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-07-17 12:01:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,882 INFO L225 Difference]: With dead ends: 244 [2020-07-17 12:01:27,882 INFO L226 Difference]: Without dead ends: 148 [2020-07-17 12:01:27,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-17 12:01:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-07-17 12:01:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-17 12:01:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-07-17 12:01:27,900 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-07-17 12:01:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,901 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-07-17 12:01:27,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-07-17 12:01:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:27,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,903 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] [2020-07-17 12:01:27,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:01:27,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-07-17 12:01:27,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137899140] [2020-07-17 12:01:27,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137899140] [2020-07-17 12:01:27,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664797470] [2020-07-17 12:01:27,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,951 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-07-17 12:01:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,971 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-07-17 12:01:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,974 INFO L225 Difference]: With dead ends: 219 [2020-07-17 12:01:27,974 INFO L226 Difference]: Without dead ends: 150 [2020-07-17 12:01:27,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-17 12:01:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-07-17 12:01:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-17 12:01:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-07-17 12:01:28,003 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-07-17 12:01:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,004 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-07-17 12:01:28,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-07-17 12:01:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:28,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,006 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] [2020-07-17 12:01:28,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:01:28,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-07-17 12:01:28,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143613199] [2020-07-17 12:01:28,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143613199] [2020-07-17 12:01:28,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118540135] [2020-07-17 12:01:28,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,049 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-07-17 12:01:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,071 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-07-17 12:01:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,076 INFO L225 Difference]: With dead ends: 276 [2020-07-17 12:01:28,076 INFO L226 Difference]: Without dead ends: 274 [2020-07-17 12:01:28,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-17 12:01:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-07-17 12:01:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-17 12:01:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-07-17 12:01:28,100 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-07-17 12:01:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,101 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-07-17 12:01:28,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-07-17 12:01:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:28,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,107 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] [2020-07-17 12:01:28,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:01:28,107 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-07-17 12:01:28,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865400281] [2020-07-17 12:01:28,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865400281] [2020-07-17 12:01:28,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318507632] [2020-07-17 12:01:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,170 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-07-17 12:01:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,195 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-07-17 12:01:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,198 INFO L225 Difference]: With dead ends: 472 [2020-07-17 12:01:28,199 INFO L226 Difference]: Without dead ends: 282 [2020-07-17 12:01:28,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-17 12:01:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-07-17 12:01:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-17 12:01:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-07-17 12:01:28,214 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-07-17 12:01:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,215 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-07-17 12:01:28,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-07-17 12:01:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,217 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] [2020-07-17 12:01:28,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:01:28,217 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-07-17 12:01:28,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259738817] [2020-07-17 12:01:28,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259738817] [2020-07-17 12:01:28,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001710016] [2020-07-17 12:01:28,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,255 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-07-17 12:01:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,276 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-07-17 12:01:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,279 INFO L225 Difference]: With dead ends: 420 [2020-07-17 12:01:28,279 INFO L226 Difference]: Without dead ends: 286 [2020-07-17 12:01:28,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-17 12:01:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-07-17 12:01:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-17 12:01:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-07-17 12:01:28,293 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-07-17 12:01:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,293 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-07-17 12:01:28,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-07-17 12:01:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,295 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] [2020-07-17 12:01:28,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:01:28,296 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-07-17 12:01:28,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334583301] [2020-07-17 12:01:28,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334583301] [2020-07-17 12:01:28,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671174322] [2020-07-17 12:01:28,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,332 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-07-17 12:01:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,355 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-07-17 12:01:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,359 INFO L225 Difference]: With dead ends: 524 [2020-07-17 12:01:28,359 INFO L226 Difference]: Without dead ends: 522 [2020-07-17 12:01:28,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-17 12:01:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-07-17 12:01:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-17 12:01:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-07-17 12:01:28,377 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-07-17 12:01:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,378 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-07-17 12:01:28,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-07-17 12:01:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,380 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] [2020-07-17 12:01:28,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:01:28,380 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-07-17 12:01:28,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840022094] [2020-07-17 12:01:28,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840022094] [2020-07-17 12:01:28,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648033986] [2020-07-17 12:01:28,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,417 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-07-17 12:01:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,449 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-07-17 12:01:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,453 INFO L225 Difference]: With dead ends: 924 [2020-07-17 12:01:28,454 INFO L226 Difference]: Without dead ends: 546 [2020-07-17 12:01:28,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-07-17 12:01:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-07-17 12:01:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-07-17 12:01:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-07-17 12:01:28,476 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-07-17 12:01:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,476 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-07-17 12:01:28,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-07-17 12:01:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,478 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] [2020-07-17 12:01:28,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:01:28,479 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-07-17 12:01:28,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007278464] [2020-07-17 12:01:28,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007278464] [2020-07-17 12:01:28,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148849199] [2020-07-17 12:01:28,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,509 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-07-17 12:01:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,538 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-07-17 12:01:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,543 INFO L225 Difference]: With dead ends: 816 [2020-07-17 12:01:28,544 INFO L226 Difference]: Without dead ends: 554 [2020-07-17 12:01:28,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-07-17 12:01:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-07-17 12:01:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-07-17 12:01:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-07-17 12:01:28,567 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-07-17 12:01:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,567 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-07-17 12:01:28,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-07-17 12:01:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,569 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] [2020-07-17 12:01:28,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:01:28,570 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-07-17 12:01:28,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55728837] [2020-07-17 12:01:28,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55728837] [2020-07-17 12:01:28,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776488559] [2020-07-17 12:01:28,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,606 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-07-17 12:01:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,638 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-07-17 12:01:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,645 INFO L225 Difference]: With dead ends: 1004 [2020-07-17 12:01:28,646 INFO L226 Difference]: Without dead ends: 1002 [2020-07-17 12:01:28,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-07-17 12:01:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-07-17 12:01:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-17 12:01:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-07-17 12:01:28,683 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-07-17 12:01:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,684 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-07-17 12:01:28,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-07-17 12:01:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,688 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] [2020-07-17 12:01:28,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:01:28,688 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-07-17 12:01:28,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597173162] [2020-07-17 12:01:28,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597173162] [2020-07-17 12:01:28,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665396538] [2020-07-17 12:01:28,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,722 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-07-17 12:01:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,769 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-07-17 12:01:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,779 INFO L225 Difference]: With dead ends: 1820 [2020-07-17 12:01:28,779 INFO L226 Difference]: Without dead ends: 1066 [2020-07-17 12:01:28,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-07-17 12:01:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-07-17 12:01:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-07-17 12:01:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-07-17 12:01:28,836 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-07-17 12:01:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,837 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-07-17 12:01:28,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-07-17 12:01:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:28,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,841 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] [2020-07-17 12:01:28,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:01:28,841 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-07-17 12:01:28,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619411839] [2020-07-17 12:01:28,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619411839] [2020-07-17 12:01:28,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123897269] [2020-07-17 12:01:28,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,876 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-07-17 12:01:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,918 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-07-17 12:01:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,926 INFO L225 Difference]: With dead ends: 1596 [2020-07-17 12:01:28,926 INFO L226 Difference]: Without dead ends: 1082 [2020-07-17 12:01:28,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-07-17 12:01:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-07-17 12:01:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-07-17 12:01:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-07-17 12:01:28,971 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-07-17 12:01:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,971 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-07-17 12:01:28,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-07-17 12:01:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:28,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,974 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] [2020-07-17 12:01:28,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:01:28,974 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-07-17 12:01:28,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813863231] [2020-07-17 12:01:28,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813863231] [2020-07-17 12:01:29,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49455073] [2020-07-17 12:01:29,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,017 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-07-17 12:01:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,057 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-07-17 12:01:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,071 INFO L225 Difference]: With dead ends: 1932 [2020-07-17 12:01:29,071 INFO L226 Difference]: Without dead ends: 1930 [2020-07-17 12:01:29,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-17 12:01:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-07-17 12:01:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-17 12:01:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-07-17 12:01:29,140 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-07-17 12:01:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,140 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-07-17 12:01:29,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-07-17 12:01:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:29,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,148 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] [2020-07-17 12:01:29,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:01:29,149 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-07-17 12:01:29,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797418007] [2020-07-17 12:01:29,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797418007] [2020-07-17 12:01:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237196158] [2020-07-17 12:01:29,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,181 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-07-17 12:01:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,240 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-07-17 12:01:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,252 INFO L225 Difference]: With dead ends: 3596 [2020-07-17 12:01:29,252 INFO L226 Difference]: Without dead ends: 2090 [2020-07-17 12:01:29,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-07-17 12:01:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-07-17 12:01:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-07-17 12:01:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-07-17 12:01:29,329 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-07-17 12:01:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,329 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-07-17 12:01:29,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-07-17 12:01:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:29,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,333 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] [2020-07-17 12:01:29,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:01:29,334 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-07-17 12:01:29,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224764257] [2020-07-17 12:01:29,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224764257] [2020-07-17 12:01:29,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242763550] [2020-07-17 12:01:29,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,365 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-07-17 12:01:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,411 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-07-17 12:01:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,423 INFO L225 Difference]: With dead ends: 3132 [2020-07-17 12:01:29,424 INFO L226 Difference]: Without dead ends: 2122 [2020-07-17 12:01:29,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-07-17 12:01:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-07-17 12:01:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-07-17 12:01:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-07-17 12:01:29,525 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-07-17 12:01:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,526 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-07-17 12:01:29,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-07-17 12:01:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:29,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,529 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] [2020-07-17 12:01:29,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:01:29,530 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-07-17 12:01:29,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271571472] [2020-07-17 12:01:29,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271571472] [2020-07-17 12:01:29,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445878447] [2020-07-17 12:01:29,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,568 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-07-17 12:01:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,666 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-07-17 12:01:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,692 INFO L225 Difference]: With dead ends: 3724 [2020-07-17 12:01:29,692 INFO L226 Difference]: Without dead ends: 3722 [2020-07-17 12:01:29,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-17 12:01:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-07-17 12:01:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-07-17 12:01:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-07-17 12:01:29,836 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-07-17 12:01:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,837 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-07-17 12:01:29,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-07-17 12:01:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:29,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,844 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] [2020-07-17 12:01:29,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 12:01:29,845 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-07-17 12:01:29,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594989334] [2020-07-17 12:01:29,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594989334] [2020-07-17 12:01:29,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529302864] [2020-07-17 12:01:29,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,883 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-07-17 12:01:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,981 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-07-17 12:01:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:30,003 INFO L225 Difference]: With dead ends: 7116 [2020-07-17 12:01:30,004 INFO L226 Difference]: Without dead ends: 4106 [2020-07-17 12:01:30,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-07-17 12:01:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-07-17 12:01:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-07-17 12:01:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-07-17 12:01:30,148 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-07-17 12:01:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:30,149 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-07-17 12:01:30,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-07-17 12:01:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:30,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:30,186 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] [2020-07-17 12:01:30,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 12:01:30,188 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-07-17 12:01:30,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:30,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936610907] [2020-07-17 12:01:30,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:30,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936610907] [2020-07-17 12:01:30,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:30,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:30,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993613412] [2020-07-17 12:01:30,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:30,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,213 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-07-17 12:01:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:30,288 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-07-17 12:01:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:30,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-17 12:01:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:30,312 INFO L225 Difference]: With dead ends: 6156 [2020-07-17 12:01:30,312 INFO L226 Difference]: Without dead ends: 4170 [2020-07-17 12:01:30,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-07-17 12:01:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-07-17 12:01:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-07-17 12:01:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-07-17 12:01:30,446 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-07-17 12:01:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:30,447 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-07-17 12:01:30,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-07-17 12:01:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:30,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:30,453 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] [2020-07-17 12:01:30,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 12:01:30,453 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-07-17 12:01:30,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:30,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990271426] [2020-07-17 12:01:30,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:30,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990271426] [2020-07-17 12:01:30,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:30,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:30,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048866397] [2020-07-17 12:01:30,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:30,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,476 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-07-17 12:01:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:30,591 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-07-17 12:01:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:30,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-17 12:01:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:30,612 INFO L225 Difference]: With dead ends: 12108 [2020-07-17 12:01:30,613 INFO L226 Difference]: Without dead ends: 8074 [2020-07-17 12:01:30,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-17 12:01:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-07-17 12:01:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-17 12:01:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-07-17 12:01:30,920 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-07-17 12:01:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:30,921 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-07-17 12:01:30,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-07-17 12:01:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:30,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:30,932 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] [2020-07-17 12:01:30,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 12:01:30,933 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-07-17 12:01:30,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:30,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131021555] [2020-07-17 12:01:30,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:30,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131021555] [2020-07-17 12:01:30,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:30,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:30,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707411515] [2020-07-17 12:01:30,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:30,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:30,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,982 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-07-17 12:01:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:31,128 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-07-17 12:01:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:31,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-17 12:01:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:31,159 INFO L225 Difference]: With dead ends: 9100 [2020-07-17 12:01:31,160 INFO L226 Difference]: Without dead ends: 9098 [2020-07-17 12:01:31,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-07-17 12:01:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-07-17 12:01:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-17 12:01:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-07-17 12:01:31,475 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-07-17 12:01:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:31,475 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-07-17 12:01:31,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-07-17 12:01:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:01:31,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:31,491 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] [2020-07-17 12:01:31,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 12:01:31,491 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-07-17 12:01:31,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:31,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088867278] [2020-07-17 12:01:31,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:31,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088867278] [2020-07-17 12:01:31,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:31,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:31,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986740216] [2020-07-17 12:01:31,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:31,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,525 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-07-17 12:01:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:31,798 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-07-17 12:01:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:31,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-17 12:01:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:31,830 INFO L225 Difference]: With dead ends: 13708 [2020-07-17 12:01:31,831 INFO L226 Difference]: Without dead ends: 13706 [2020-07-17 12:01:31,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-07-17 12:01:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-07-17 12:01:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-07-17 12:01:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-07-17 12:01:32,121 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-07-17 12:01:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:32,122 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-07-17 12:01:32,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-07-17 12:01:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:01:32,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:32,143 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] [2020-07-17 12:01:32,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 12:01:32,144 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-07-17 12:01:32,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:32,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952749374] [2020-07-17 12:01:32,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:32,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952749374] [2020-07-17 12:01:32,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:32,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:32,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32174176] [2020-07-17 12:01:32,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:32,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:32,171 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-07-17 12:01:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:32,506 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-07-17 12:01:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:32,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-17 12:01:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:32,540 INFO L225 Difference]: With dead ends: 27788 [2020-07-17 12:01:32,540 INFO L226 Difference]: Without dead ends: 15754 [2020-07-17 12:01:32,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-07-17 12:01:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-07-17 12:01:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-07-17 12:01:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-07-17 12:01:32,936 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-07-17 12:01:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:32,937 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-07-17 12:01:32,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-07-17 12:01:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:01:33,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:33,088 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] [2020-07-17 12:01:33,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 12:01:33,088 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-07-17 12:01:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:33,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967119999] [2020-07-17 12:01:33,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:33,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967119999] [2020-07-17 12:01:33,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:33,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:33,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394214347] [2020-07-17 12:01:33,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:33,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:33,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:33,114 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-07-17 12:01:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:33,299 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-07-17 12:01:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:33,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-17 12:01:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:33,332 INFO L225 Difference]: With dead ends: 23820 [2020-07-17 12:01:33,332 INFO L226 Difference]: Without dead ends: 16138 [2020-07-17 12:01:33,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-07-17 12:01:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-07-17 12:01:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-07-17 12:01:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-07-17 12:01:33,688 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-07-17 12:01:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:33,689 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-07-17 12:01:33,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-07-17 12:01:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:01:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:33,710 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] [2020-07-17 12:01:33,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 12:01:33,711 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-07-17 12:01:33,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:33,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555094952] [2020-07-17 12:01:33,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:33,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555094952] [2020-07-17 12:01:33,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:33,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:33,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931955858] [2020-07-17 12:01:33,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:33,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:33,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:33,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:33,732 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-07-17 12:01:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:34,465 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-07-17 12:01:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:34,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-17 12:01:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:34,524 INFO L225 Difference]: With dead ends: 26636 [2020-07-17 12:01:34,524 INFO L226 Difference]: Without dead ends: 26634 [2020-07-17 12:01:34,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-07-17 12:01:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-07-17 12:01:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-07-17 12:01:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-07-17 12:01:35,135 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-07-17 12:01:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:35,135 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-07-17 12:01:35,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-07-17 12:01:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:01:35,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:35,173 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] [2020-07-17 12:01:35,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 12:01:35,173 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-07-17 12:01:35,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:35,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284677284] [2020-07-17 12:01:35,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:35,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284677284] [2020-07-17 12:01:35,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:35,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:35,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869927216] [2020-07-17 12:01:35,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:35,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:35,196 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-07-17 12:01:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:35,547 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-07-17 12:01:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:35,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-17 12:01:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:35,616 INFO L225 Difference]: With dead ends: 55308 [2020-07-17 12:01:35,616 INFO L226 Difference]: Without dead ends: 31242 [2020-07-17 12:01:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-07-17 12:01:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-07-17 12:01:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-07-17 12:01:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-07-17 12:01:36,567 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-07-17 12:01:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:36,568 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-07-17 12:01:36,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-07-17 12:01:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:01:36,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:36,612 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] [2020-07-17 12:01:36,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 12:01:36,612 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-07-17 12:01:36,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:36,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890592642] [2020-07-17 12:01:36,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:36,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890592642] [2020-07-17 12:01:36,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:36,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:36,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712685128] [2020-07-17 12:01:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:36,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:36,642 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-07-17 12:01:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:36,997 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-07-17 12:01:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:36,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 12:01:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:37,060 INFO L225 Difference]: With dead ends: 46860 [2020-07-17 12:01:37,061 INFO L226 Difference]: Without dead ends: 31754 [2020-07-17 12:01:37,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-07-17 12:01:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-07-17 12:01:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-07-17 12:01:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-07-17 12:01:38,435 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-07-17 12:01:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:38,435 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-07-17 12:01:38,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-07-17 12:01:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:01:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:38,462 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] [2020-07-17 12:01:38,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 12:01:38,462 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-07-17 12:01:38,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:38,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105037387] [2020-07-17 12:01:38,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:38,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105037387] [2020-07-17 12:01:38,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:38,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:38,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716378892] [2020-07-17 12:01:38,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:38,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:38,487 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-07-17 12:01:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:39,115 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-07-17 12:01:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:39,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 12:01:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:39,194 INFO L225 Difference]: With dead ends: 51210 [2020-07-17 12:01:39,194 INFO L226 Difference]: Without dead ends: 51208 [2020-07-17 12:01:39,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-07-17 12:01:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-07-17 12:01:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-07-17 12:01:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-07-17 12:01:40,348 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-07-17 12:01:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:40,349 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-07-17 12:01:40,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-07-17 12:01:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:01:40,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:40,398 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] [2020-07-17 12:01:40,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 12:01:40,399 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-07-17 12:01:40,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:40,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363455067] [2020-07-17 12:01:40,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:40,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363455067] [2020-07-17 12:01:40,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:40,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:40,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106014455] [2020-07-17 12:01:40,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:40,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:40,423 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-07-17 12:01:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:41,498 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-07-17 12:01:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:41,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 12:01:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:41,500 INFO L225 Difference]: With dead ends: 109576 [2020-07-17 12:01:41,500 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:01:41,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:01:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:01:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:01:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:01:41,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-17 12:01:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:41,595 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:01:41,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:01:41,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:01:41,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 12:01:41,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:01:41,633 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:01:41,634 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:01:41,634 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:01:41,634 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:01:41,634 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-07-17 12:01:41,635 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,636 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-07-17 12:01:41,637 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,637 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,637 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-07-17 12:01:41,637 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,637 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-07-17 12:01:41,638 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,638 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,638 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-17 12:01:41,638 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-07-17 12:01:41,638 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-07-17 12:01:41,639 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-07-17 12:01:41,640 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-07-17 12:01:41,641 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,641 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-07-17 12:01:41,641 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-07-17 12:01:41,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:01:41 BoogieIcfgContainer [2020-07-17 12:01:41,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:01:41,660 INFO L168 Benchmark]: Toolchain (without parser) took 15728.01 ms. Allocated memory was 145.2 MB in the beginning and 1.1 GB in the end (delta: 973.6 MB). Free memory was 102.7 MB in the beginning and 741.4 MB in the end (delta: -638.7 MB). Peak memory consumption was 334.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:41,660 INFO L168 Benchmark]: CDTParser took 1.59 ms. Allocated memory is still 145.2 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 12:01:41,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.90 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 91.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:41,667 INFO L168 Benchmark]: Boogie Preprocessor took 144.82 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:41,667 INFO L168 Benchmark]: RCFGBuilder took 425.15 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 160.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:41,668 INFO L168 Benchmark]: TraceAbstraction took 14862.93 ms. Allocated memory was 202.9 MB in the beginning and 1.1 GB in the end (delta: 915.9 MB). Free memory was 159.3 MB in the beginning and 741.4 MB in the end (delta: -582.2 MB). Peak memory consumption was 333.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:41,676 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.59 ms. Allocated memory is still 145.2 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.90 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 91.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.82 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.15 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 160.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14862.93 ms. Allocated memory was 202.9 MB in the beginning and 1.1 GB in the end (delta: 915.9 MB). Free memory was 159.3 MB in the beginning and 741.4 MB in the end (delta: -582.2 MB). Peak memory consumption was 333.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.7s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...