/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:11,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:11,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:11,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:11,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:11,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:11,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:11,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:11,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:11,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:11,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:11,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:11,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:11,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:11,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:11,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:11,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:11,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:11,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:11,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:11,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:11,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:11,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:11,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:11,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:35:11,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:11,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:11,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:11,503 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 [2019-11-23 20:35:11,518 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:11,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:11,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:11,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:11,520 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:11,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:11,520 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:11,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:11,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:11,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:11,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:11,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:11,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:11,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:11,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:11,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:11,522 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:11,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:11,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:11,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:11,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:11,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:11,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:11,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:11,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:11,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:11,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:11,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:11,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:11,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:11,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:11,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:11,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:11,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:11,893 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:11,894 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-11-23 20:35:11,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f929c5bbf/f405243b2e5a4defb93f5284eb9eab1a/FLAGf651e8174 [2019-11-23 20:35:12,369 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:12,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-11-23 20:35:12,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f929c5bbf/f405243b2e5a4defb93f5284eb9eab1a/FLAGf651e8174 [2019-11-23 20:35:12,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f929c5bbf/f405243b2e5a4defb93f5284eb9eab1a [2019-11-23 20:35:12,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:12,802 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:12,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:12,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:12,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:12,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:12" (1/1) ... [2019-11-23 20:35:12,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1110cbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:12, skipping insertion in model container [2019-11-23 20:35:12,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:12" (1/1) ... [2019-11-23 20:35:12,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:12,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:13,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:13,095 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:13,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:13,142 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13 WrapperNode [2019-11-23 20:35:13,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:13,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:13,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:13,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:13,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:13,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:13,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:13,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:13,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (1/1) ... [2019-11-23 20:35:13,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:13,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:13,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:13,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:13,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (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 [2019-11-23 20:35:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:13,625 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:13,625 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:13,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:13 BoogieIcfgContainer [2019-11-23 20:35:13,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:13,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:13,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:13,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:13,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:12" (1/3) ... [2019-11-23 20:35:13,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6822e9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:13, skipping insertion in model container [2019-11-23 20:35:13,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:13" (2/3) ... [2019-11-23 20:35:13,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6822e9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:13, skipping insertion in model container [2019-11-23 20:35:13,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:13" (3/3) ... [2019-11-23 20:35:13,652 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2019-11-23 20:35:13,679 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:13,687 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:13,721 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:13,748 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:13,748 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:13,749 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:13,749 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:13,749 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:13,749 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:13,749 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:13,750 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:35:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:35:13,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:13,768 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,769 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:35:13,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936663800] [2019-11-23 20:35:13,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:13,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936663800] [2019-11-23 20:35:13,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:13,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:13,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307196576] [2019-11-23 20:35:13,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:13,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:13,940 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:35:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,016 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:35:14,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:14,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:35:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,026 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:35:14,026 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:35:14,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:35:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:35:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:35:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:35:14,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:35:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,060 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:35:14,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:35:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:14,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,061 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,061 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:35:14,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070548503] [2019-11-23 20:35:14,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:14,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070548503] [2019-11-23 20:35:14,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:14,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:14,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459343709] [2019-11-23 20:35:14,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:14,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:14,114 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:35:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,161 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:35:14,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:14,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:35:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,166 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:35:14,166 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:14,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:35:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:35:14,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:35:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,172 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:35:14,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:35:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:14,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,174 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:35:14,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610976228] [2019-11-23 20:35:14,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:14,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610976228] [2019-11-23 20:35:14,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967260196] [2019-11-23 20:35:14,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:14,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:35:14,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625356340] [2019-11-23 20:35:14,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:14,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:14,361 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:35:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,431 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:35:14,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:14,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:35:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,432 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:35:14,432 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:14,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:35:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:35:14,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:35:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,439 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:35:14,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:35:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:14,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,440 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,646 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:35:14,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733248055] [2019-11-23 20:35:14,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:14,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733248055] [2019-11-23 20:35:14,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395478973] [2019-11-23 20:35:14,767 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:14,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:14,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:14,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2019-11-23 20:35:14,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129850981] [2019-11-23 20:35:14,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:35:14,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:35:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:14,856 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-23 20:35:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,940 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-23 20:35:14,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:14,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 20:35:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,941 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:35:14,942 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:35:14,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:35:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 19. [2019-11-23 20:35:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:35:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 20:35:14,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-11-23 20:35:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,949 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 20:35:14,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:35:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 20:35:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:35:14,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,950 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,162 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash 910345687, now seen corresponding path program 3 times [2019-11-23 20:35:15,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964100956] [2019-11-23 20:35:15,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:15,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964100956] [2019-11-23 20:35:15,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450499435] [2019-11-23 20:35:15,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:15,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062750169] [2019-11-23 20:35:15,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:15,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:15,350 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2019-11-23 20:35:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,412 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-11-23 20:35:15,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:15,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-23 20:35:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,414 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:35:15,415 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:35:15,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:35:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 20. [2019-11-23 20:35:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:35:15,421 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2019-11-23 20:35:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,421 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:35:15,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:35:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:35:15,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,422 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,633 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1792608621, now seen corresponding path program 4 times [2019-11-23 20:35:15,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964423993] [2019-11-23 20:35:15,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:15,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964423993] [2019-11-23 20:35:15,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001584820] [2019-11-23 20:35:15,752 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:15,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:15,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:15,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2019-11-23 20:35:15,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097512254] [2019-11-23 20:35:15,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:15,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:15,856 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 11 states. [2019-11-23 20:35:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,974 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-11-23 20:35:15,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:15,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-11-23 20:35:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,976 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:35:15,976 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:35:15,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:35:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2019-11-23 20:35:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:35:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:35:15,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-11-23 20:35:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,990 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:35:15,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:35:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:35:15,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,991 INFO L410 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:16,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,195 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:16,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1106372530, now seen corresponding path program 5 times [2019-11-23 20:35:16,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:16,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491093803] [2019-11-23 20:35:16,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:16,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491093803] [2019-11-23 20:35:16,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939886149] [2019-11-23 20:35:16,354 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,561 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:35:16,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:16,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:16,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2019-11-23 20:35:16,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126597384] [2019-11-23 20:35:16,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:35:16,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:35:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:16,634 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2019-11-23 20:35:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:16,754 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-11-23 20:35:16,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:35:16,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-11-23 20:35:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:16,755 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:35:16,756 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:35:16,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:35:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 28. [2019-11-23 20:35:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:35:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:35:16,762 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2019-11-23 20:35:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:16,763 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:35:16,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:35:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:35:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:35:16,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:16,764 INFO L410 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:16,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,976 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash 66221299, now seen corresponding path program 6 times [2019-11-23 20:35:16,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:16,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469477005] [2019-11-23 20:35:16,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:17,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469477005] [2019-11-23 20:35:17,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898339362] [2019-11-23 20:35:17,130 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:17,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:17,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:17,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:17,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:17,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:17,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125439677] [2019-11-23 20:35:17,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:17,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:17,312 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2019-11-23 20:35:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,409 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2019-11-23 20:35:17,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:17,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-23 20:35:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,412 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:35:17,412 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:35:17,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:35:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 29. [2019-11-23 20:35:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:35:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-23 20:35:17,427 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2019-11-23 20:35:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,428 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-23 20:35:17,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-23 20:35:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:35:17,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,436 INFO L410 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:17,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,642 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2104306423, now seen corresponding path program 7 times [2019-11-23 20:35:17,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:17,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442318231] [2019-11-23 20:35:17,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:17,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442318231] [2019-11-23 20:35:17,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377700745] [2019-11-23 20:35:17,772 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:17,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:35:17,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:17,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:17,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 17 [2019-11-23 20:35:17,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718947346] [2019-11-23 20:35:17,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:35:17,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:35:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:17,905 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 17 states. [2019-11-23 20:35:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:18,030 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2019-11-23 20:35:18,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:18,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2019-11-23 20:35:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:18,033 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:35:18,033 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:35:18,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:35:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 33. [2019-11-23 20:35:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:35:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:35:18,040 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-11-23 20:35:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:18,042 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:35:18,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:35:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:35:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:35:18,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:18,045 INFO L410 BasicCegarLoop]: trace histogram [14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,248 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1228496520, now seen corresponding path program 8 times [2019-11-23 20:35:18,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853232757] [2019-11-23 20:35:18,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:18,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853232757] [2019-11-23 20:35:18,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095606663] [2019-11-23 20:35:18,378 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:18,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:18,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:35:18,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:18,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:18,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2019-11-23 20:35:18,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076537630] [2019-11-23 20:35:18,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:35:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:35:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:18,508 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 20 states. [2019-11-23 20:35:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:18,634 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2019-11-23 20:35:18,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:35:18,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-11-23 20:35:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:18,636 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:35:18,636 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:35:18,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:35:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 37. [2019-11-23 20:35:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:35:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 20:35:18,645 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2019-11-23 20:35:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:18,646 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 20:35:18,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:35:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 20:35:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:35:18,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:18,647 INFO L410 BasicCegarLoop]: trace histogram [17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,851 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1806929769, now seen corresponding path program 9 times [2019-11-23 20:35:18,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944883195] [2019-11-23 20:35:18,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:18,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944883195] [2019-11-23 20:35:18,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193023384] [2019-11-23 20:35:18,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:19,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:19,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:19,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:19,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:19,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:19,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:19,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488675051] [2019-11-23 20:35:19,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:19,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:19,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:19,481 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2019-11-23 20:35:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:19,593 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2019-11-23 20:35:19,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:19,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2019-11-23 20:35:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:19,594 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:35:19,595 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:35:19,595 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:35:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 38. [2019-11-23 20:35:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:35:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:35:19,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2019-11-23 20:35:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:19,602 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:35:19,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:35:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:35:19,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:19,603 INFO L410 BasicCegarLoop]: trace histogram [17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:19,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:19,804 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -128801837, now seen corresponding path program 10 times [2019-11-23 20:35:19,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:19,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282309819] [2019-11-23 20:35:19,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:19,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282309819] [2019-11-23 20:35:19,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720516967] [2019-11-23 20:35:19,947 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:20,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:20,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:35:20,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:20,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:20,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2019-11-23 20:35:20,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270874876] [2019-11-23 20:35:20,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:35:20,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:35:20,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:20,147 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 23 states. [2019-11-23 20:35:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,313 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2019-11-23 20:35:20,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:35:20,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2019-11-23 20:35:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,315 INFO L225 Difference]: With dead ends: 115 [2019-11-23 20:35:20,315 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:35:20,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:35:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 42. [2019-11-23 20:35:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:35:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:35:20,327 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2019-11-23 20:35:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,327 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:35:20,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:35:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:35:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:35:20,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,329 INFO L410 BasicCegarLoop]: trace histogram [20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,536 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash -279043662, now seen corresponding path program 11 times [2019-11-23 20:35:20,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74709955] [2019-11-23 20:35:20,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:35:20,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74709955] [2019-11-23 20:35:20,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100130764] [2019-11-23 20:35:20,696 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,871 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 20:35:26,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:35:26,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:35:26,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131776101] [2019-11-23 20:35:26,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:35:26,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:35:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:26,900 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 15 states. [2019-11-23 20:35:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:27,041 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2019-11-23 20:35:27,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:35:27,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2019-11-23 20:35:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:27,043 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:35:27,044 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:35:27,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:35:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 43. [2019-11-23 20:35:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:35:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-23 20:35:27,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2019-11-23 20:35:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:27,052 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-23 20:35:27,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:35:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-23 20:35:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:35:27,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:27,054 INFO L410 BasicCegarLoop]: trace histogram [20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:27,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:27,262 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -8972776, now seen corresponding path program 12 times [2019-11-23 20:35:27,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:27,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824223673] [2019-11-23 20:35:27,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:35:27,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824223673] [2019-11-23 20:35:27,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890333647] [2019-11-23 20:35:27,410 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:34,885 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:35:34,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:34,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:35:34,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:35:35,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:35,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 27 [2019-11-23 20:35:35,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451863459] [2019-11-23 20:35:35,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:35:35,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:35:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:35,021 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 27 states. [2019-11-23 20:35:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:35,186 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2019-11-23 20:35:35,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:35:35,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2019-11-23 20:35:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:35,188 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:35:35,188 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:35:35,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:35:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 48. [2019-11-23 20:35:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:35:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:35:35,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2019-11-23 20:35:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:35,196 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:35:35,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:35:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:35:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:35:35,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:35,201 INFO L410 BasicCegarLoop]: trace histogram [24, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:35,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:35,402 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash 887750578, now seen corresponding path program 13 times [2019-11-23 20:35:35,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:35,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799815124] [2019-11-23 20:35:35,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:35:35,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799815124] [2019-11-23 20:35:35,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007599021] [2019-11-23 20:35:35,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:35,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:35:35,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:35,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:35,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 30 [2019-11-23 20:35:35,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282833127] [2019-11-23 20:35:35,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:35:35,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:35:35,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=436, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:35,865 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 30 states. [2019-11-23 20:35:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:36,076 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2019-11-23 20:35:36,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:35:36,077 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 46 [2019-11-23 20:35:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:36,078 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:35:36,079 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:35:36,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=434, Invalid=436, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:35:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2019-11-23 20:35:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:35:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-23 20:35:36,091 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 46 [2019-11-23 20:35:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:36,092 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-23 20:35:36,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:35:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-23 20:35:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:35:36,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:36,094 INFO L410 BasicCegarLoop]: trace histogram [27, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:36,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:36,299 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2124203021, now seen corresponding path program 14 times [2019-11-23 20:35:36,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:36,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641379429] [2019-11-23 20:35:36,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:35:36,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641379429] [2019-11-23 20:35:36,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147452380] [2019-11-23 20:35:36,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:36,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:36,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:36,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:35:36,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:36,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:36,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 32 [2019-11-23 20:35:36,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748909905] [2019-11-23 20:35:36,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:36,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=497, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:36,782 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 32 states. [2019-11-23 20:35:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:36,954 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2019-11-23 20:35:36,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:35:36,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2019-11-23 20:35:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:36,956 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:35:36,956 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:35:36,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=497, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:35:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 55. [2019-11-23 20:35:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:35:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-23 20:35:36,967 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2019-11-23 20:35:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:36,967 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-23 20:35:36,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-23 20:35:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:35:36,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:36,973 INFO L410 BasicCegarLoop]: trace histogram [29, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:37,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:37,173 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1543142231, now seen corresponding path program 15 times [2019-11-23 20:35:37,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:37,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963671490] [2019-11-23 20:35:37,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-23 20:35:37,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963671490] [2019-11-23 20:35:37,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606686071] [2019-11-23 20:35:37,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:47,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:35:47,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:47,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:35:47,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-23 20:35:47,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:47,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:35:47,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276380637] [2019-11-23 20:35:47,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:35:47,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:35:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:47,372 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2019-11-23 20:35:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:47,484 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2019-11-23 20:35:47,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:35:47,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2019-11-23 20:35:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:47,485 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:35:47,485 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 20:35:47,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 20:35:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 56. [2019-11-23 20:35:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:35:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-23 20:35:47,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2019-11-23 20:35:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:47,491 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-23 20:35:47,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:35:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-23 20:35:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:35:47,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:47,504 INFO L410 BasicCegarLoop]: trace histogram [29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:47,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:47,712 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 644215059, now seen corresponding path program 16 times [2019-11-23 20:35:47,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:47,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409392428] [2019-11-23 20:35:47,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-23 20:35:47,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409392428] [2019-11-23 20:35:47,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301381492] [2019-11-23 20:35:47,935 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:47,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:47,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:48,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:35:48,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:35:48,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:48,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 35 [2019-11-23 20:35:48,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229163401] [2019-11-23 20:35:48,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:35:48,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:35:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:48,168 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 35 states. [2019-11-23 20:35:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:48,364 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2019-11-23 20:35:48,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:48,365 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 54 [2019-11-23 20:35:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:48,366 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:35:48,366 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:35:48,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:35:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 60. [2019-11-23 20:35:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:35:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:35:48,374 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2019-11-23 20:35:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:48,375 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:35:48,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:35:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:35:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 20:35:48,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:48,375 INFO L410 BasicCegarLoop]: trace histogram [32, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:48,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:48,579 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1023579214, now seen corresponding path program 17 times [2019-11-23 20:35:48,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:48,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270871160] [2019-11-23 20:35:48,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:35:48,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270871160] [2019-11-23 20:35:48,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714291412] [2019-11-23 20:35:48,811 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true