/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:25:44,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:25:44,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:25:44,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:25:44,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:25:44,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:25:44,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:25:44,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:25:44,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:25:44,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:25:44,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:25:44,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:25:44,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:25:44,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:25:44,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:25:44,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:25:44,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:25:44,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:25:44,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:25:44,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:25:44,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:25:44,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:25:44,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:25:44,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:25:44,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:25:44,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:25:44,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:25:44,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:25:44,252 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 20:25:44,265 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:25:44,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:25:44,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:25:44,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:25:44,267 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:25:44,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:25:44,268 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:25:44,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:25:44,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:25:44,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:25:44,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:25:44,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:25:44,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:25:44,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:25:44,269 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:25:44,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:25:44,270 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:25:44,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:25:44,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:25:44,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:25:44,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:25:44,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:25:44,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:25:44,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:25:44,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:25:44,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:25:44,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:25:44,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:25:44,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:25:44,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:25:44,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:25:44,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:25:44,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:25:44,574 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:25:44,574 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:25:44,575 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-23 20:25:44,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f064e0c80/b2d381ebc6934e3dbffecfeec34faf62/FLAGe7fe72957 [2019-11-23 20:25:45,096 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:25:45,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-23 20:25:45,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f064e0c80/b2d381ebc6934e3dbffecfeec34faf62/FLAGe7fe72957 [2019-11-23 20:25:45,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f064e0c80/b2d381ebc6934e3dbffecfeec34faf62 [2019-11-23 20:25:45,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:25:45,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:25:45,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:45,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:25:45,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:25:45,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6eb97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45, skipping insertion in model container [2019-11-23 20:25:45,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:25:45,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:25:45,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:45,744 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:25:45,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:45,780 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:25:45,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45 WrapperNode [2019-11-23 20:25:45,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:45,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:45,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:25:45,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:25:45,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:45,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:25:45,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:25:45,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:25:45,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (1/1) ... [2019-11-23 20:25:45,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:25:45,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:25:45,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:25:45,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:25:45,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (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 20:25:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:25:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:25:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:25:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:25:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:25:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:25:46,283 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:25:46,283 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:25:46,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:46 BoogieIcfgContainer [2019-11-23 20:25:46,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:25:46,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:25:46,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:25:46,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:25:46,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:25:45" (1/3) ... [2019-11-23 20:25:46,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff13af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:46, skipping insertion in model container [2019-11-23 20:25:46,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:45" (2/3) ... [2019-11-23 20:25:46,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff13af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:46, skipping insertion in model container [2019-11-23 20:25:46,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:46" (3/3) ... [2019-11-23 20:25:46,305 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-11-23 20:25:46,317 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:25:46,327 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:25:46,339 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:25:46,364 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:25:46,364 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:25:46,364 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:25:46,364 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:25:46,364 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:25:46,365 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:25:46,365 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:25:46,365 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:25:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:25:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:25:46,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:46,384 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:46,384 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2019-11-23 20:25:46,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:46,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754190276] [2019-11-23 20:25:46,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:46,554 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 20:25:46,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754190276] [2019-11-23 20:25:46,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:25:46,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:25:46,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566481396] [2019-11-23 20:25:46,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:25:46,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:46,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:25:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:25:46,589 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 20:25:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:46,721 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2019-11-23 20:25:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:25:46,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:25:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:46,736 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:25:46,737 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:25:46,745 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 20:25:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:25:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-23 20:25:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:25:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:25:46,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2019-11-23 20:25:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:46,792 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:25:46,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:25:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:25:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:25:46,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:46,795 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:46,796 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2019-11-23 20:25:46,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:46,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470694069] [2019-11-23 20:25:46,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:46,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470694069] [2019-11-23 20:25:46,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515408107] [2019-11-23 20:25:46,887 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 20:25:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:46,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:25:46,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:46,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:46,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:25:46,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752459756] [2019-11-23 20:25:46,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:25:46,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:46,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:25:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:46,991 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2019-11-23 20:25:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:47,049 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-23 20:25:47,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:25:47,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:25:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:47,051 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:25:47,051 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:25:47,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:25:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-23 20:25:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:25:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 20:25:47,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2019-11-23 20:25:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:47,059 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 20:25:47,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:25:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 20:25:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:25:47,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:47,061 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:47,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:47,271 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2019-11-23 20:25:47,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:47,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:25:47,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:47,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:25:47,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097643643] [2019-11-23 20:25:47,370 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 20:25:47,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:47,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:47,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:25:47,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:47,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:47,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:25:47,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871091180] [2019-11-23 20:25:47,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:25:47,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:25:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:47,440 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2019-11-23 20:25:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:47,519 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-23 20:25:47,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:25:47,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-23 20:25:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:47,520 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:25:47,521 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:25:47,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:25:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-23 20:25:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:25:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:25:47,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2019-11-23 20:25:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:47,529 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:25:47,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:25:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:25:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:25:47,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:47,530 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:47,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:47,734 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2019-11-23 20:25:47,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:47,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465364251] [2019-11-23 20:25:47,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:47,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465364251] [2019-11-23 20:25:47,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415848134] [2019-11-23 20:25:47,856 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 20:25:47,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:25:47,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:47,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:25:47,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:47,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:47,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:25:47,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388460679] [2019-11-23 20:25:47,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:25:47,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:25:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:47,940 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2019-11-23 20:25:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:48,024 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-23 20:25:48,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:25:48,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-23 20:25:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:48,027 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:25:48,027 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:25:48,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 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 20:25:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:25:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:25:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:25:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-23 20:25:48,039 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2019-11-23 20:25:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:48,039 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-23 20:25:48,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:25:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-23 20:25:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:25:48,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:48,044 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:48,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:48,245 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2019-11-23 20:25:48,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:48,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979675433] [2019-11-23 20:25:48,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:25:48,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979675433] [2019-11-23 20:25:48,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315155430] [2019-11-23 20:25:48,358 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 20:25:48,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:48,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:48,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:25:48,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:25:48,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:48,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:25:48,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470605128] [2019-11-23 20:25:48,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:25:48,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:48,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:25:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:48,446 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2019-11-23 20:25:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:48,544 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-23 20:25:48,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:25:48,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-23 20:25:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:48,548 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:25:48,548 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:25:48,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:25:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-23 20:25:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:25:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-11-23 20:25:48,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2019-11-23 20:25:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:48,563 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-11-23 20:25:48,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:25:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-11-23 20:25:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:25:48,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:48,565 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:48,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:48,772 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2019-11-23 20:25:48,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:48,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405853018] [2019-11-23 20:25:48,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:25:48,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405853018] [2019-11-23 20:25:48,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086846890] [2019-11-23 20:25:48,891 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 20:25:49,220 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:25:49,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:49,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:25:49,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:25:49,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:49,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:25:49,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626683269] [2019-11-23 20:25:49,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:25:49,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:25:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:49,246 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2019-11-23 20:25:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:49,361 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-11-23 20:25:49,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:25:49,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-23 20:25:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:49,365 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:25:49,365 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:25:49,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:25:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-23 20:25:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:25:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:25:49,375 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2019-11-23 20:25:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:49,378 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:25:49,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:25:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:25:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:25:49,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:49,379 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:49,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:49,581 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2019-11-23 20:25:49,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:49,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486505025] [2019-11-23 20:25:49,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:25:49,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486505025] [2019-11-23 20:25:49,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187349943] [2019-11-23 20:25:49,683 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 20:25:49,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:25:49,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:49,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:25:49,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:25:49,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:49,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-11-23 20:25:49,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21909436] [2019-11-23 20:25:49,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:25:49,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:25:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:49,976 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2019-11-23 20:25:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:50,121 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2019-11-23 20:25:50,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:25:50,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-11-23 20:25:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:50,123 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:25:50,123 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:25:50,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:25:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:25:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:25:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-11-23 20:25:50,131 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 41 [2019-11-23 20:25:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:50,131 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-11-23 20:25:50,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:25:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-11-23 20:25:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:25:50,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:50,132 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:50,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:50,336 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 7 times [2019-11-23 20:25:50,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:50,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:25:50,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:50,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:25:50,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312975045] [2019-11-23 20:25:50,474 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 20:25:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:50,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:25:50,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:50,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:50,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:25:50,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247063459] [2019-11-23 20:25:50,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:25:50,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:25:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:50,543 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2019-11-23 20:25:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:50,657 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2019-11-23 20:25:50,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:25:50,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-11-23 20:25:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:50,662 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:25:50,662 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:25:50,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:25:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-23 20:25:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:25:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:25:50,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2019-11-23 20:25:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:50,670 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:25:50,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:25:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:25:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:25:50,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:50,671 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:50,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:50,875 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 8 times [2019-11-23 20:25:50,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:50,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143512915] [2019-11-23 20:25:50,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:51,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143512915] [2019-11-23 20:25:51,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642987868] [2019-11-23 20:25:51,018 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 20:25:51,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:51,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:51,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:25:51,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:51,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:51,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:25:51,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719313546] [2019-11-23 20:25:51,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:25:51,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:25:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:51,101 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2019-11-23 20:25:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:51,214 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2019-11-23 20:25:51,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:25:51,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-23 20:25:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:51,215 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:25:51,216 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:25:51,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 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 20:25:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:25:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-11-23 20:25:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:25:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-11-23 20:25:51,223 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2019-11-23 20:25:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:51,224 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-11-23 20:25:51,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:25:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-11-23 20:25:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:25:51,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:51,225 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:51,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:51,437 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 9 times [2019-11-23 20:25:51,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:51,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039493897] [2019-11-23 20:25:51,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:51,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039493897] [2019-11-23 20:25:51,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638722795] [2019-11-23 20:25:51,648 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 20:25:51,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:25:51,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:51,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:25:51,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:51,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:51,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:25:51,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217792121] [2019-11-23 20:25:51,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:25:51,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:25:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:25:51,989 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2019-11-23 20:25:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:52,148 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:25:52,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:25:52,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2019-11-23 20:25:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:52,149 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:25:52,149 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:25:52,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:25:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:25:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-23 20:25:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:25:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2019-11-23 20:25:52,157 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2019-11-23 20:25:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:52,157 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2019-11-23 20:25:52,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:25:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2019-11-23 20:25:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:25:52,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:52,159 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:52,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:52,369 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 10 times [2019-11-23 20:25:52,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:52,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730217719] [2019-11-23 20:25:52,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-23 20:25:52,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730217719] [2019-11-23 20:25:52,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938985305] [2019-11-23 20:25:52,530 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 20:25:52,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:52,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:52,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:25:52,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 20:25:52,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:52,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:25:52,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111199573] [2019-11-23 20:25:52,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:25:52,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:25:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:25:52,623 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2019-11-23 20:25:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:52,771 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-11-23 20:25:52,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:25:52,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2019-11-23 20:25:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:52,772 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:25:52,773 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:25:52,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:25:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:25:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-11-23 20:25:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:25:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:25:52,798 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2019-11-23 20:25:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:52,799 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:25:52,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:25:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:25:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:25:52,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:52,800 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:53,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:53,007 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 11 times [2019-11-23 20:25:53,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:53,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847271418] [2019-11-23 20:25:53,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:25:53,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847271418] [2019-11-23 20:25:53,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026296345] [2019-11-23 20:25:53,157 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 20:26:36,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:26:36,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:36,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:26:36,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 20:26:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:26:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520191519] [2019-11-23 20:26:36,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:26:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:26:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:36,254 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2019-11-23 20:26:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:36,400 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-11-23 20:26:36,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:26:36,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2019-11-23 20:26:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:36,401 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:26:36,401 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:26:36,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:26:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-11-23 20:26:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:26:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-23 20:26:36,409 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2019-11-23 20:26:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:36,409 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-23 20:26:36,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:26:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-23 20:26:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:26:36,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:36,411 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:36,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:36,626 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 12 times [2019-11-23 20:26:36,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:36,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889854838] [2019-11-23 20:26:36,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:26:36,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889854838] [2019-11-23 20:26:36,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770395226] [2019-11-23 20:26:36,796 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 20:27:13,504 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 20:27:13,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:13,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:27:13,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-23 20:27:13,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:13,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:27:13,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988687240] [2019-11-23 20:27:13,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:27:13,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:27:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:13,548 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2019-11-23 20:27:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:13,736 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2019-11-23 20:27:13,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:27:13,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2019-11-23 20:27:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:13,738 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:27:13,738 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:27:13,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:27:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:27:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:27:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-11-23 20:27:13,746 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2019-11-23 20:27:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:13,746 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-11-23 20:27:13,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:27:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-11-23 20:27:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:27:13,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:13,748 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:13,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:13,958 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 13 times [2019-11-23 20:27:13,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:13,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274997974] [2019-11-23 20:27:13,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:27:14,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274997974] [2019-11-23 20:27:14,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359710209] [2019-11-23 20:27:14,141 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 20:27:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:14,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:27:14,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:27:14,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:14,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:27:14,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224978426] [2019-11-23 20:27:14,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:27:14,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:27:14,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:14,249 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2019-11-23 20:27:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:14,396 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-23 20:27:14,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:27:14,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-23 20:27:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:14,398 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:27:14,398 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:27:14,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:27:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-23 20:27:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:27:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2019-11-23 20:27:14,406 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2019-11-23 20:27:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:14,406 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2019-11-23 20:27:14,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:27:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2019-11-23 20:27:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:27:14,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:14,408 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:14,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:14,610 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 14 times [2019-11-23 20:27:14,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:14,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561590100] [2019-11-23 20:27:14,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:27:15,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561590100] [2019-11-23 20:27:15,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439104279] [2019-11-23 20:27:15,053 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 20:27:15,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:15,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:15,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:27:15,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:27:15,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:15,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:27:15,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167251368] [2019-11-23 20:27:15,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:27:15,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:27:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:15,201 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2019-11-23 20:27:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:15,356 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2019-11-23 20:27:15,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:27:15,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-11-23 20:27:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:15,357 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:27:15,357 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:27:15,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:27:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-11-23 20:27:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:27:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2019-11-23 20:27:15,370 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2019-11-23 20:27:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:15,370 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2019-11-23 20:27:15,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:27:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2019-11-23 20:27:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:27:15,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:15,371 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:15,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:15,572 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 15 times [2019-11-23 20:27:15,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:15,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160293608] [2019-11-23 20:27:15,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-23 20:27:15,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160293608] [2019-11-23 20:27:15,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674593444] [2019-11-23 20:27:15,783 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 20:27:18,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:27:18,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:18,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:27:18,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-23 20:27:18,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:18,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:27:18,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645742693] [2019-11-23 20:27:18,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:27:18,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:27:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:18,923 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2019-11-23 20:27:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:19,104 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2019-11-23 20:27:19,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:27:19,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-11-23 20:27:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:19,106 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:27:19,106 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:27:19,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:27:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-11-23 20:27:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:27:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2019-11-23 20:27:19,112 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2019-11-23 20:27:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:19,112 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2019-11-23 20:27:19,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:27:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2019-11-23 20:27:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:27:19,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:19,113 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:19,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:19,320 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 16 times [2019-11-23 20:27:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:19,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079345478] [2019-11-23 20:27:19,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:27:19,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079345478] [2019-11-23 20:27:19,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981606804] [2019-11-23 20:27:19,561 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 20:27:19,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:19,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:19,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:27:19,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-23 20:27:19,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:19,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:27:19,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804149905] [2019-11-23 20:27:19,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:27:19,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:27:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:19,666 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 21 states. [2019-11-23 20:27:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:19,844 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2019-11-23 20:27:19,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:27:19,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2019-11-23 20:27:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:19,846 INFO L225 Difference]: With dead ends: 185 [2019-11-23 20:27:19,846 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:27:19,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:27:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2019-11-23 20:27:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:27:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2019-11-23 20:27:19,853 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 96 [2019-11-23 20:27:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:19,853 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2019-11-23 20:27:19,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:27:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2019-11-23 20:27:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:27:19,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:19,854 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:20,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:20,058 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:20,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1850851316, now seen corresponding path program 17 times [2019-11-23 20:27:20,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:20,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935111745] [2019-11-23 20:27:20,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-11-23 20:27:20,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935111745] [2019-11-23 20:27:20,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882587180] [2019-11-23 20:27:20,290 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