/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_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:21:56,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:21:56,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:21:56,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:21:56,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:21:56,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:21:56,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:21:56,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:21:56,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:21:56,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:21:56,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:21:56,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:21:56,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:21:56,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:21:56,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:21:56,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:21:56,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:21:56,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:21:56,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:21:56,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:21:56,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:21:56,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:21:56,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:21:56,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:21:56,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:21:56,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:21:56,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:21:56,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:21:56,237 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 20:21:56,268 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:21:56,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:21:56,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:21:56,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:21:56,270 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:21:56,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:21:56,272 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:21:56,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:21:56,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:21:56,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:21:56,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:21:56,275 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:21:56,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:21:56,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:21:56,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:21:56,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:21:56,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:21:56,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:21:56,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:21:56,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:21:56,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:21:56,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:21:56,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:21:56,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:21:56,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:21:56,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:21:56,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:21:56,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:21:56,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:21:56,602 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:21:56,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-11-23 20:21:56,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bfd56b1/ba45440389c4498aa319d000f3479c14/FLAG26ae4926d [2019-11-23 20:21:57,154 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:21:57,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-11-23 20:21:57,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bfd56b1/ba45440389c4498aa319d000f3479c14/FLAG26ae4926d [2019-11-23 20:21:57,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bfd56b1/ba45440389c4498aa319d000f3479c14 [2019-11-23 20:21:57,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:21:57,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:21:57,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:21:57,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:21:57,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:21:57,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6163be9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57, skipping insertion in model container [2019-11-23 20:21:57,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:21:57,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:21:57,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:21:57,825 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:21:57,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:21:57,862 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:21:57,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57 WrapperNode [2019-11-23 20:21:57,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:21:57,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:21:57,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:21:57,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:21:57,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:21:57,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:21:57,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:21:57,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:21:58,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:58,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:21:58,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:21:58,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:21:58,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:21:58,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (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 20:21:58,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:21:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:21:58,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:21:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:21:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:21:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:21:58,322 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:21:58,323 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:21:58,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:21:58 BoogieIcfgContainer [2019-11-23 20:21:58,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:21:58,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:21:58,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:21:58,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:21:58,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:21:57" (1/3) ... [2019-11-23 20:21:58,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6165dcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:21:58, skipping insertion in model container [2019-11-23 20:21:58,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (2/3) ... [2019-11-23 20:21:58,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6165dcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:21:58, skipping insertion in model container [2019-11-23 20:21:58,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:21:58" (3/3) ... [2019-11-23 20:21:58,349 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2019-11-23 20:21:58,363 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:21:58,373 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:21:58,394 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:21:58,421 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:21:58,421 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:21:58,422 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:21:58,422 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:21:58,422 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:21:58,422 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:21:58,422 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:21:58,422 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:21:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 20:21:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:21:58,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,443 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2019-11-23 20:21:58,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460829371] [2019-11-23 20:21:58,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,618 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 20:21:58,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460829371] [2019-11-23 20:21:58,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:21:58,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:21:58,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334146648] [2019-11-23 20:21:58,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:21:58,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:21:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:21:58,641 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-23 20:21:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:58,681 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-11-23 20:21:58,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:21:58,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:21:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:58,691 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:21:58,691 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:21:58,694 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 20:21:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:21:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:21:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:21:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:21:58,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-23 20:21:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:58,725 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:21:58,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:21:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:21:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:21:58,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,726 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,727 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2019-11-23 20:21:58,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159689279] [2019-11-23 20:21:58,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:21:58,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159689279] [2019-11-23 20:21:58,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:21:58,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:21:58,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062894721] [2019-11-23 20:21:58,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:21:58,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:21:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:21:58,780 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-11-23 20:21:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:58,814 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:21:58,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:21:58,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:21:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:58,815 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:21:58,816 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:21:58,817 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 20:21:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:21:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:21:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:21:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:21:58,821 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:21:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:58,822 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:21:58,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:21:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:21:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:21:58,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,823 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,823 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2019-11-23 20:21:58,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860570039] [2019-11-23 20:21:58,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:21:58,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860570039] [2019-11-23 20:21:58,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685314817] [2019-11-23 20:21:58,896 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 20:21:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:21:58,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:21:58,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:58,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:21:58,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336954022] [2019-11-23 20:21:58,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:21:58,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:21:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:21:58,993 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-11-23 20:21:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:59,025 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-23 20:21:59,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:21:59,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-23 20:21:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:59,027 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:21:59,027 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:21:59,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 20:21:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:21:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 20:21:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:21:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:21:59,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-23 20:21:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:59,033 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:21:59,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:21:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:21:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:21:59,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:59,035 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:59,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:59,240 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash -628241457, now seen corresponding path program 2 times [2019-11-23 20:21:59,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:59,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390501367] [2019-11-23 20:21:59,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:21:59,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390501367] [2019-11-23 20:21:59,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974887222] [2019-11-23 20:21:59,300 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 20:21:59,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:59,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:59,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:21:59,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:21:59,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:59,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-11-23 20:21:59,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115140450] [2019-11-23 20:21:59,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:21:59,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:21:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:21:59,381 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2019-11-23 20:21:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:59,442 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-23 20:21:59,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:21:59,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-23 20:21:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:59,444 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:21:59,444 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:21:59,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:21:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:21:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-23 20:21:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:21:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 20:21:59,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-11-23 20:21:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:59,450 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 20:21:59,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:21:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 20:21:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:21:59,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:59,451 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:59,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:59,656 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1927655819, now seen corresponding path program 3 times [2019-11-23 20:21:59,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:59,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102731889] [2019-11-23 20:21:59,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:21:59,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102731889] [2019-11-23 20:21:59,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727016731] [2019-11-23 20:21:59,796 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 20:21:59,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:21:59,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:59,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:21:59,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:21:59,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:59,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:21:59,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539153705] [2019-11-23 20:21:59,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:21:59,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:21:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:21:59,872 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2019-11-23 20:21:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:59,921 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-11-23 20:21:59,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:21:59,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:21:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:59,925 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:21:59,926 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:21:59,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:21:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:21:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:21:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:21:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:21:59,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-11-23 20:21:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:59,933 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:21:59,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:21:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:21:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:21:59,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:59,935 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:00,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:00,136 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 4 times [2019-11-23 20:22:00,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:00,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316961383] [2019-11-23 20:22:00,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:22:00,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316961383] [2019-11-23 20:22:00,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389801050] [2019-11-23 20:22:00,219 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 20:22:00,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:00,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:00,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:00,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:22:00,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:00,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:22:00,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93759384] [2019-11-23 20:22:00,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:22:00,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:22:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:00,332 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-23 20:22:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:00,421 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-23 20:22:00,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:00,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-23 20:22:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:00,428 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:22:00,428 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:22:00,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:22:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-23 20:22:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:22:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:22:00,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2019-11-23 20:22:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:00,441 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:22:00,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:22:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:22:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:22:00,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:00,443 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:00,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:00,656 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 5 times [2019-11-23 20:22:00,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:00,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212483909] [2019-11-23 20:22:00,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:00,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212483909] [2019-11-23 20:22:00,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966227218] [2019-11-23 20:22:00,771 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 20:22:00,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:22:00,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:00,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:00,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:00,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:00,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:22:00,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417941126] [2019-11-23 20:22:00,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:22:00,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:00,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:22:00,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:00,859 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-23 20:22:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:00,899 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-23 20:22:00,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:00,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-23 20:22:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:00,900 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:22:00,900 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:22:00,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 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 20:22:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:22:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:22:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:22:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:22:00,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-11-23 20:22:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:00,907 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:22:00,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:22:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:22:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:22:00,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:00,908 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:01,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:01,113 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash 922473155, now seen corresponding path program 6 times [2019-11-23 20:22:01,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:01,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138161038] [2019-11-23 20:22:01,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:01,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138161038] [2019-11-23 20:22:01,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060182221] [2019-11-23 20:22:01,216 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 20:22:01,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:22:01,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:01,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:01,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:01,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:01,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:22:01,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000428785] [2019-11-23 20:22:01,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:01,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:01,306 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2019-11-23 20:22:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:01,350 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2019-11-23 20:22:01,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:22:01,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-23 20:22:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:01,352 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:22:01,352 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:22:01,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 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 20:22:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:22:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-23 20:22:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:22:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:22:01,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2019-11-23 20:22:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:01,358 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:22:01,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:22:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:22:01,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:01,359 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:01,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:01,569 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash -916145087, now seen corresponding path program 7 times [2019-11-23 20:22:01,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:01,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490334367] [2019-11-23 20:22:01,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:01,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490334367] [2019-11-23 20:22:01,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539796141] [2019-11-23 20:22:01,693 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 20:22:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:01,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:01,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:22:01,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:01,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-11-23 20:22:01,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399726723] [2019-11-23 20:22:01,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:22:01,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:22:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:01,827 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2019-11-23 20:22:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:01,895 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-11-23 20:22:01,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:22:01,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2019-11-23 20:22:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:01,896 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:22:01,896 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:22:01,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:22:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-11-23 20:22:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:22:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:22:01,903 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2019-11-23 20:22:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:01,903 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:22:01,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:22:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:22:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:22:01,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:01,904 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:02,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:02,106 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:02,106 INFO L82 PathProgramCache]: Analyzing trace with hash 39831805, now seen corresponding path program 8 times [2019-11-23 20:22:02,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:02,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061045252] [2019-11-23 20:22:02,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:22:02,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061045252] [2019-11-23 20:22:02,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842442743] [2019-11-23 20:22:02,215 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 20:22:02,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:02,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:02,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:02,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:22:02,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:02,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:22:02,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071950965] [2019-11-23 20:22:02,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:02,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:02,289 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2019-11-23 20:22:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:02,328 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2019-11-23 20:22:02,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:22:02,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-11-23 20:22:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:02,329 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:22:02,329 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:22:02,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 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 20:22:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:22:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 20:22:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:22:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:22:02,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2019-11-23 20:22:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:02,335 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:22:02,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:22:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:22:02,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:02,337 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:02,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:02,544 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash -267477957, now seen corresponding path program 9 times [2019-11-23 20:22:02,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:02,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074831737] [2019-11-23 20:22:02,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:22:02,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074831737] [2019-11-23 20:22:02,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012841400] [2019-11-23 20:22:02,672 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 20:22:02,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:02,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:02,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:22:02,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:22:02,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:02,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-23 20:22:02,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313826719] [2019-11-23 20:22:02,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:22:02,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:22:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:22:02,874 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 17 states. [2019-11-23 20:22:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:03,012 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-11-23 20:22:03,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:22:03,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-23 20:22:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:03,013 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:22:03,013 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:22:03,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:22:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:22:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-23 20:22:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:22:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:22:03,021 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2019-11-23 20:22:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:03,021 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:22:03,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:22:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:22:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:22:03,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:03,027 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:03,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:03,239 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1872622601, now seen corresponding path program 10 times [2019-11-23 20:22:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:03,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596550617] [2019-11-23 20:22:03,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:22:03,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596550617] [2019-11-23 20:22:03,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976096243] [2019-11-23 20:22:03,345 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 20:22:03,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:03,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:03,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:03,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:22:03,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:03,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-11-23 20:22:03,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678443909] [2019-11-23 20:22:03,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:03,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:03,527 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2019-11-23 20:22:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:03,627 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-11-23 20:22:03,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:22:03,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-23 20:22:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:03,628 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:22:03,628 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:22:03,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:22:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-11-23 20:22:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:22:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:22:03,634 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2019-11-23 20:22:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:03,634 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:22:03,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:22:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:22:03,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:03,635 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:03,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:03,839 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 299904435, now seen corresponding path program 11 times [2019-11-23 20:22:03,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:03,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175303046] [2019-11-23 20:22:03,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:22:03,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175303046] [2019-11-23 20:22:03,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496589191] [2019-11-23 20:22:03,950 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 20:22:04,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:22:04,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:04,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:04,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:22:04,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:04,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:04,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150511957] [2019-11-23 20:22:04,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:04,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:04,157 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2019-11-23 20:22:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:04,202 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-11-23 20:22:04,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:04,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-11-23 20:22:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:04,205 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:22:04,205 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:22:04,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 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 20:22:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:22:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:22:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:22:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:22:04,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2019-11-23 20:22:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:04,219 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:22:04,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:22:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:22:04,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:04,220 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:04,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:04,433 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 12 times [2019-11-23 20:22:04,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:04,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432368157] [2019-11-23 20:22:04,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:22:04,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432368157] [2019-11-23 20:22:04,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924676052] [2019-11-23 20:22:04,567 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 20:22:04,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:22:04,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:04,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:22:04,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:22:04,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:04,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:22:04,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426634999] [2019-11-23 20:22:04,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:04,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:04,986 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2019-11-23 20:22:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,031 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2019-11-23 20:22:05,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:22:05,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-23 20:22:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,032 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:22:05,032 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:22:05,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 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 20:22:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:22:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-23 20:22:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:22:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-23 20:22:05,038 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2019-11-23 20:22:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,038 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-23 20:22:05,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-23 20:22:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:22:05,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,039 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:05,240 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash 392429935, now seen corresponding path program 13 times [2019-11-23 20:22:05,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681177869] [2019-11-23 20:22:05,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:22:05,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681177869] [2019-11-23 20:22:05,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561590100] [2019-11-23 20:22:05,370 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 20:22:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:22:05,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:22:05,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:05,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-11-23 20:22:05,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232911654] [2019-11-23 20:22:05,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:22:05,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:22:05,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:22:05,590 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2019-11-23 20:22:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,687 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2019-11-23 20:22:05,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:22:05,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2019-11-23 20:22:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,688 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:22:05,688 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:22:05,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:22:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:22:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-11-23 20:22:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:22:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:22:05,693 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2019-11-23 20:22:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,693 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:22:05,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:22:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:22:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:22:05,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,694 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:05,898 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1924626645, now seen corresponding path program 14 times [2019-11-23 20:22:05,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173224248] [2019-11-23 20:22:05,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:22:06,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173224248] [2019-11-23 20:22:06,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050380635] [2019-11-23 20:22:06,042 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 20:22:06,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:06,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:06,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:22:06,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:22:06,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:06,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2019-11-23 20:22:06,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581238573] [2019-11-23 20:22:06,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:22:06,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:06,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:22:06,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:22:06,249 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 25 states. [2019-11-23 20:22:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:06,396 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2019-11-23 20:22:06,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:22:06,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2019-11-23 20:22:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:06,397 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:22:06,397 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:22:06,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:22:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:22:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-23 20:22:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:22:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:22:06,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2019-11-23 20:22:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:06,403 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:22:06,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:22:06,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:22:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:22:06,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:06,404 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:06,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:06,609 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 694730471, now seen corresponding path program 15 times [2019-11-23 20:22:06,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:06,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833068701] [2019-11-23 20:22:06,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:22:06,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833068701] [2019-11-23 20:22:06,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110982031] [2019-11-23 20:22:06,787 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 20:22:07,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:22:07,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:07,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:22:07,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:08,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:08,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2019-11-23 20:22:08,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976921985] [2019-11-23 20:22:08,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:22:08,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:22:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:22:08,070 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 27 states. [2019-11-23 20:22:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:08,176 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2019-11-23 20:22:08,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:22:08,176 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2019-11-23 20:22:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:08,177 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:22:08,177 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:22:08,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:22:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:22:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:22:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:22:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:22:08,182 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2019-11-23 20:22:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:08,183 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:22:08,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:22:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:22:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:22:08,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:08,184 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:08,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:08,391 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -350246749, now seen corresponding path program 16 times [2019-11-23 20:22:08,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:08,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190003640] [2019-11-23 20:22:08,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:08,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190003640] [2019-11-23 20:22:08,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974614645] [2019-11-23 20:22:08,543 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 20:22:08,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:08,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:08,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:22:08,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:22:08,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:08,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-23 20:22:08,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841479403] [2019-11-23 20:22:08,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:22:08,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:08,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:22:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:22:08,820 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2019-11-23 20:22:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:08,990 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2019-11-23 20:22:08,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:22:08,991 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2019-11-23 20:22:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:08,991 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:22:08,991 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:22:08,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:22:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:22:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-23 20:22:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:22:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:22:08,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2019-11-23 20:22:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:08,997 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:22:08,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:22:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:22:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:22:08,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:08,998 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:09,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:09,202 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:09,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1689762721, now seen corresponding path program 17 times [2019-11-23 20:22:09,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:09,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485213607] [2019-11-23 20:22:09,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:22:09,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485213607] [2019-11-23 20:22:09,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783409691] [2019-11-23 20:22:09,347 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 [2019-11-23 20:22:10,280 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:22:10,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:10,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:22:10,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:22:10,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:10,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-11-23 20:22:10,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981829359] [2019-11-23 20:22:10,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:22:10,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:22:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:22:10,532 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 31 states. [2019-11-23 20:22:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:10,673 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2019-11-23 20:22:10,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:22:10,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2019-11-23 20:22:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:10,674 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:22:10,674 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:22:10,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:22:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:22:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:22:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:22:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:22:10,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2019-11-23 20:22:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:10,680 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:22:10,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:22:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:22:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:22:10,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:10,681 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:10,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:10,881 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1279103515, now seen corresponding path program 18 times [2019-11-23 20:22:10,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:10,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686754810] [2019-11-23 20:22:10,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:22:11,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686754810] [2019-11-23 20:22:11,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043509954] [2019-11-23 20:22:11,057 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:12,845 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 20:22:12,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:12,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:22:12,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:22:12,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:12,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:22:12,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083815537] [2019-11-23 20:22:12,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:12,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:12,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:12,881 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2019-11-23 20:22:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:12,935 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2019-11-23 20:22:12,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:22:12,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-11-23 20:22:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:12,936 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:22:12,936 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:22:12,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:22:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:22:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:22:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-23 20:22:12,941 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2019-11-23 20:22:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:12,941 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-23 20:22:12,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-23 20:22:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:22:12,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:12,942 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:13,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:13,144 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1791752807, now seen corresponding path program 19 times [2019-11-23 20:22:13,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:13,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102825721] [2019-11-23 20:22:13,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:22:13,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102825721] [2019-11-23 20:22:13,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972465399] [2019-11-23 20:22:13,395 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:13,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:22:13,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:22:13,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:13,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-11-23 20:22:13,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433171493] [2019-11-23 20:22:13,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:22:13,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:13,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:22:13,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:22:13,676 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 34 states. [2019-11-23 20:22:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:13,847 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2019-11-23 20:22:13,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:22:13,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2019-11-23 20:22:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:13,849 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:22:13,849 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:22:13,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:22:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:22:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2019-11-23 20:22:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:22:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-11-23 20:22:13,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2019-11-23 20:22:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:13,853 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-11-23 20:22:13,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:22:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-11-23 20:22:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:22:13,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:13,854 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:14,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:14,055 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 797967957, now seen corresponding path program 20 times [2019-11-23 20:22:14,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:14,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416151666] [2019-11-23 20:22:14,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:14,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416151666] [2019-11-23 20:22:14,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622470052] [2019-11-23 20:22:14,305 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:14,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:14,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:14,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:22:14,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:14,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:14,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:22:14,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350592389] [2019-11-23 20:22:14,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:14,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:14,402 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 19 states. [2019-11-23 20:22:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:14,468 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2019-11-23 20:22:14,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:22:14,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-11-23 20:22:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:14,470 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:22:14,470 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:22:14,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:22:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-23 20:22:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:22:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-23 20:22:14,475 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2019-11-23 20:22:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:14,475 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-23 20:22:14,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-23 20:22:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:22:14,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:14,476 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:14,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:14,687 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1769620371, now seen corresponding path program 21 times [2019-11-23 20:22:14,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:14,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905470243] [2019-11-23 20:22:14,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:14,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905470243] [2019-11-23 20:22:14,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721327640] [2019-11-23 20:22:14,884 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:22,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-11-23 20:22:22,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:22,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:22:22,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:22,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:22,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:22:22,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999368610] [2019-11-23 20:22:22,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:22:22,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:22:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:22:22,747 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2019-11-23 20:22:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:22,847 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2019-11-23 20:22:22,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:22:22,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-11-23 20:22:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:22,849 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:22:22,849 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:22:22,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 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 20:22:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:22:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 20:22:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:22:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-11-23 20:22:22,853 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2019-11-23 20:22:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:22,854 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-11-23 20:22:22,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:22:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-11-23 20:22:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:22:22,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:22,855 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:23,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:23,056 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 22 times [2019-11-23 20:22:23,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:23,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469010328] [2019-11-23 20:22:23,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:23,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469010328] [2019-11-23 20:22:23,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642890820] [2019-11-23 20:22:23,310 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:23,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:23,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:23,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:22:23,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:23,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:23,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:22:23,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528534964] [2019-11-23 20:22:23,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:22:23,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:23,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:22:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:23,414 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2019-11-23 20:22:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:23,478 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2019-11-23 20:22:23,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:22:23,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2019-11-23 20:22:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:23,481 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:22:23,481 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:22:23,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:22:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:22:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:22:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-11-23 20:22:23,485 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2019-11-23 20:22:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:23,485 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-11-23 20:22:23,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:22:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-11-23 20:22:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:22:23,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:23,486 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:23,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:23,689 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash -369645745, now seen corresponding path program 23 times [2019-11-23 20:22:23,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:23,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783131487] [2019-11-23 20:22:23,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:22:23,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783131487] [2019-11-23 20:22:23,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675545572] [2019-11-23 20:22:23,904 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:31,861 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:22:31,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:31,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:22:31,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:22:32,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:32,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2019-11-23 20:22:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380241958] [2019-11-23 20:22:32,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:22:32,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:22:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:22:32,310 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 39 states. [2019-11-23 20:22:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:32,500 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2019-11-23 20:22:32,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:22:32,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2019-11-23 20:22:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:32,502 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:22:32,502 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:22:32,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:22:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:22:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2019-11-23 20:22:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:22:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-23 20:22:32,507 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2019-11-23 20:22:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:32,507 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-23 20:22:32,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:22:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-23 20:22:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:22:32,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:32,508 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:32,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:32,709 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1817330421, now seen corresponding path program 24 times [2019-11-23 20:22:32,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:32,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232117931] [2019-11-23 20:22:32,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:22:33,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232117931] [2019-11-23 20:22:33,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807302987] [2019-11-23 20:22:33,003 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:40,363 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-23 20:22:40,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:40,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:22:40,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:22:40,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:40,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:22:40,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472404183] [2019-11-23 20:22:40,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:22:40,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:22:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:22:40,402 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 23 states. [2019-11-23 20:22:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:40,483 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2019-11-23 20:22:40,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:22:40,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 83 [2019-11-23 20:22:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:40,484 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:22:40,484 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:22:40,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:22:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:22:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:22:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:22:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2019-11-23 20:22:40,489 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2019-11-23 20:22:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:40,489 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2019-11-23 20:22:40,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:22:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2019-11-23 20:22:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:22:40,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:40,490 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:40,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:40,697 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1052429175, now seen corresponding path program 25 times [2019-11-23 20:22:40,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:40,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617011182] [2019-11-23 20:22:40,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:22:41,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617011182] [2019-11-23 20:22:41,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301481415] [2019-11-23 20:22:41,017 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:41,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:22:41,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:22:41,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:41,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2019-11-23 20:22:41,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639206861] [2019-11-23 20:22:41,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:22:41,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:22:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:22:41,601 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 42 states. [2019-11-23 20:22:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:41,757 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2019-11-23 20:22:41,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:22:41,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 85 [2019-11-23 20:22:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:41,759 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:22:41,759 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:22:41,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:22:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:22:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:22:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:22:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-11-23 20:22:41,763 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2019-11-23 20:22:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:41,763 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-11-23 20:22:41,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:22:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-11-23 20:22:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:22:41,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:41,764 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:41,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:41,968 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1967391419, now seen corresponding path program 26 times [2019-11-23 20:22:41,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:41,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604126947] [2019-11-23 20:22:41,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 20:22:42,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604126947] [2019-11-23 20:22:42,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149031776] [2019-11-23 20:22:42,285 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:42,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:42,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:42,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:22:42,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:22:42,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:42,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2019-11-23 20:22:42,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179886026] [2019-11-23 20:22:42,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:22:42,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:42,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:22:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:22:42,826 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 44 states. [2019-11-23 20:22:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:43,001 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2019-11-23 20:22:43,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:22:43,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 89 [2019-11-23 20:22:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:43,002 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:22:43,002 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:22:43,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:22:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:22:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-11-23 20:22:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:22:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-11-23 20:22:43,006 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2019-11-23 20:22:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:43,007 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-11-23 20:22:43,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:22:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-11-23 20:22:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:22:43,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:43,008 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:43,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:43,212 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash -373491711, now seen corresponding path program 27 times [2019-11-23 20:22:43,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:43,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542054979] [2019-11-23 20:22:43,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:22:43,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542054979] [2019-11-23 20:22:43,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072878920] [2019-11-23 20:22:43,642 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:59,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:22:59,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:59,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:22:59,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:23:00,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:00,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2019-11-23 20:23:00,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899026077] [2019-11-23 20:23:00,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:23:00,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:23:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:23:00,190 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 46 states. [2019-11-23 20:23:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:00,442 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2019-11-23 20:23:00,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:23:00,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 93 [2019-11-23 20:23:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:00,443 INFO L225 Difference]: With dead ends: 155 [2019-11-23 20:23:00,443 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:23:00,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:23:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:23:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2019-11-23 20:23:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:23:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2019-11-23 20:23:00,447 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2019-11-23 20:23:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:00,448 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2019-11-23 20:23:00,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:23:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2019-11-23 20:23:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:23:00,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:00,449 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:00,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:00,658 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash 677586109, now seen corresponding path program 28 times [2019-11-23 20:23:00,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:00,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960755656] [2019-11-23 20:23:00,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:23:00,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960755656] [2019-11-23 20:23:00,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825333588] [2019-11-23 20:23:00,976 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:01,047 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:23:01,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:01,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:23:01,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:23:01,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:01,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2019-11-23 20:23:01,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370413796] [2019-11-23 20:23:01,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:23:01,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:23:01,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:23:01,466 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 48 states. [2019-11-23 20:23:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:01,734 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2019-11-23 20:23:01,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:23:01,739 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 97 [2019-11-23 20:23:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:01,740 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:23:01,740 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:23:01,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:23:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:23:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2019-11-23 20:23:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:23:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-11-23 20:23:01,746 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2019-11-23 20:23:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:01,746 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-11-23 20:23:01,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:23:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-11-23 20:23:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:23:01,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:01,747 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:01,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:01,948 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2051638137, now seen corresponding path program 29 times [2019-11-23 20:23:01,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:01,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741796682] [2019-11-23 20:23:01,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:23:02,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741796682] [2019-11-23 20:23:02,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885428340] [2019-11-23 20:23:02,257 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:06,071 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:23:06,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:06,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:23:06,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:23:06,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:06,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 50 [2019-11-23 20:23:06,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557048665] [2019-11-23 20:23:06,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:23:06,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:23:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:23:06,607 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 50 states. [2019-11-23 20:23:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:06,849 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2019-11-23 20:23:06,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:23:06,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 101 [2019-11-23 20:23:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:06,850 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:23:06,850 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:23:06,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:23:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:23:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2019-11-23 20:23:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:23:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-11-23 20:23:06,853 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2019-11-23 20:23:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:06,854 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-11-23 20:23:06,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:23:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-11-23 20:23:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:23:06,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:06,855 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:07,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:07,062 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2089489461, now seen corresponding path program 30 times [2019-11-23 20:23:07,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:07,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415914687] [2019-11-23 20:23:07,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:23:07,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415914687] [2019-11-23 20:23:07,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945002840] [2019-11-23 20:23:07,406 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:43,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-11-23 20:23:43,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:43,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:23:43,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-23 20:23:44,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:44,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2019-11-23 20:23:44,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272566197] [2019-11-23 20:23:44,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:23:44,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:44,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:23:44,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:23:44,477 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 52 states. [2019-11-23 20:23:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:44,755 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2019-11-23 20:23:44,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:23:44,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 105 [2019-11-23 20:23:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:44,757 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:23:44,757 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:23:44,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:23:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:23:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:23:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:23:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2019-11-23 20:23:44,763 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2019-11-23 20:23:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:44,763 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2019-11-23 20:23:44,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:23:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2019-11-23 20:23:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:23:44,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:44,764 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1]