/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-crafted/xor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:13:33,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:13:33,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:13:33,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:13:33,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:13:33,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:13:33,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:13:33,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:13:33,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:13:33,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:13:33,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:13:33,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:13:33,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:13:33,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:13:33,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:13:33,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:13:33,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:13:33,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:13:33,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:13:33,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:13:33,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:13:33,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:13:33,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:13:33,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:13:33,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:13:33,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:13:33,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:13:33,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:13:33,217 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 20:13:33,237 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:13:33,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:13:33,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:13:33,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:13:33,239 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:13:33,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:13:33,240 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:13:33,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:13:33,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:13:33,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:13:33,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:13:33,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:13:33,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:13:33,242 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:13:33,242 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:13:33,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:13:33,242 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:13:33,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:13:33,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:13:33,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:13:33,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:13:33,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:13:33,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:13:33,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:13:33,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:13:33,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:13:33,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:13:33,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:13:33,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:13:33,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:13:33,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:13:33,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:13:33,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:13:33,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:13:33,585 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:13:33,586 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor2.i [2019-11-23 20:13:33,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2901708b2/a7f28036ba4945388f3f094b7d79fb62/FLAG4bcdae000 [2019-11-23 20:13:34,126 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:13:34,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor2.i [2019-11-23 20:13:34,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2901708b2/a7f28036ba4945388f3f094b7d79fb62/FLAG4bcdae000 [2019-11-23 20:13:34,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2901708b2/a7f28036ba4945388f3f094b7d79fb62 [2019-11-23 20:13:34,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:13:34,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:13:34,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:34,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:13:34,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:13:34,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55caf869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34, skipping insertion in model container [2019-11-23 20:13:34,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:13:34,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:13:34,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:34,742 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:13:34,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:34,865 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:13:34,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34 WrapperNode [2019-11-23 20:13:34,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:34,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:34,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:13:34,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:13:34,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:34,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:13:34,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:13:34,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:13:34,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:13:34,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:13:34,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:13:34,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:13:34,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (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 20:13:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:13:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:13:35,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:13:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:13:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:13:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:13:35,344 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:13:35,345 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:13:35,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:35 BoogieIcfgContainer [2019-11-23 20:13:35,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:13:35,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:13:35,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:13:35,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:13:35,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:13:34" (1/3) ... [2019-11-23 20:13:35,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e0dd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:35, skipping insertion in model container [2019-11-23 20:13:35,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (2/3) ... [2019-11-23 20:13:35,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e0dd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:35, skipping insertion in model container [2019-11-23 20:13:35,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:35" (3/3) ... [2019-11-23 20:13:35,354 INFO L109 eAbstractionObserver]: Analyzing ICFG xor2.i [2019-11-23 20:13:35,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:13:35,372 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:13:35,389 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:13:35,420 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:13:35,420 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:13:35,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:13:35,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:13:35,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:13:35,421 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:13:35,421 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:13:35,421 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:13:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:13:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:13:35,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,443 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,444 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:13:35,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210113396] [2019-11-23 20:13:35,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,616 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 20:13:35,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210113396] [2019-11-23 20:13:35,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917859689] [2019-11-23 20:13:35,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,640 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:13:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,691 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:13:35,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:35,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:13:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,703 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:13:35,703 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:13:35,707 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 20:13:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:13:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:13:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:13:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:13:35,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:13:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,742 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:13:35,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:13:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:13:35,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,743 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,744 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:13:35,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781086230] [2019-11-23 20:13:35,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,811 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 20:13:35,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781086230] [2019-11-23 20:13:35,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122583420] [2019-11-23 20:13:35,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,818 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:13:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,869 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:13:35,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:35,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:13:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,870 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:13:35,871 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:13:35,872 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 20:13:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:13:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:13:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:13:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:13:35,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:13:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,880 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:13:35,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:13:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:13:35,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,881 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:13:35,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815900162] [2019-11-23 20:13:35,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:35,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815900162] [2019-11-23 20:13:35,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838945563] [2019-11-23 20:13:35,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,985 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:13:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,003 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:13:36,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:36,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:13:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,004 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:13:36,004 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:13:36,005 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 20:13:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:13:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:13:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:13:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:13:36,012 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:13:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,012 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:13:36,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:13:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:13:36,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,014 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:36,014 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:13:36,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:36,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118392226] [2019-11-23 20:13:36,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,106 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 20:13:36,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118392226] [2019-11-23 20:13:36,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451105057] [2019-11-23 20:13:36,107 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 20:13:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:36,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:36,215 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 20:13:36,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:36,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:13:36,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356690327] [2019-11-23 20:13:36,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:13:36,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:13:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:13:36,220 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:13:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,249 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:13:36,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:13:36,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:13:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,251 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:13:36,251 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:13:36,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:13:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:13:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:13:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:13:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:13:36,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:13:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,259 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:13:36,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:13:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:13:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:13:36,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,260 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:36,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:36,475 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:13:36,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:36,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390669073] [2019-11-23 20:13:36,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:36,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390669073] [2019-11-23 20:13:36,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491344539] [2019-11-23 20:13:36,578 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 20:13:36,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:36,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:36,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:36,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:36,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:36,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:13:36,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118185957] [2019-11-23 20:13:36,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:13:36,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:13:36,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:36,712 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:13:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,777 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:13:36,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:13:36,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:13:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,780 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:13:36,780 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:13:36,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:13:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:13:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:13:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:13:36,793 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:13:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,794 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:13:36,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:13:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:13:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:13:36,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,797 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,001 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:13:37,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834676262] [2019-11-23 20:13:37,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:37,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834676262] [2019-11-23 20:13:37,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988776204] [2019-11-23 20:13:37,135 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 20:13:37,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:13:37,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:37,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:37,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:13:37,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:13:37,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958413342] [2019-11-23 20:13:37,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:13:37,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:13:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:37,219 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:13:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:37,313 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:13:37,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:13:37,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:13:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:37,315 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:13:37,315 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:13:37,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:13:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:13:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:13:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:13:37,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:13:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:37,322 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:13:37,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:13:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:13:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:13:37,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:37,324 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,528 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:13:37,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505465086] [2019-11-23 20:13:37,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,618 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 20:13:37,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505465086] [2019-11-23 20:13:37,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308930240] [2019-11-23 20:13:37,619 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 20:13:37,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:37,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:37,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:37,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:13:37,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:13:37,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952207529] [2019-11-23 20:13:37,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:13:37,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:13:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:37,743 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:13:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:37,878 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:13:37,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:37,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:13:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:37,880 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:13:37,881 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:13:37,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:13:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:13:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:13:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:13:37,898 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:13:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:37,898 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:13:37,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:13:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:13:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:13:37,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:37,903 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:38,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,115 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:13:38,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:38,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706867913] [2019-11-23 20:13:38,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:13:38,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706867913] [2019-11-23 20:13:38,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652626401] [2019-11-23 20:13:38,265 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 20:13:38,348 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:13:38,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:38,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:38,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:13:38,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:38,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:13:38,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628536238] [2019-11-23 20:13:38,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:38,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,407 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:13:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:38,525 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:13:38,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:38,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:13:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:38,526 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:13:38,527 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:13:38,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:13:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:13:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:13:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:13:38,537 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:13:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:38,538 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:13:38,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:13:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:13:38,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:38,541 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:38,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,742 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:13:38,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:38,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763232870] [2019-11-23 20:13:38,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:13:38,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763232870] [2019-11-23 20:13:38,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097756102] [2019-11-23 20:13:38,862 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 20:13:38,921 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:13:38,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:38,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:38,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:13:38,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:38,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:13:38,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055342475] [2019-11-23 20:13:38,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:38,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,966 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:13:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,022 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:13:39,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:39,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:13:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,023 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:13:39,023 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:13:39,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:13:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:13:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:13:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:13:39,038 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:13:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,039 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:13:39,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:13:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:13:39,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,041 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,242 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:13:39,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130836868] [2019-11-23 20:13:39,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130836868] [2019-11-23 20:13:39,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515582712] [2019-11-23 20:13:39,356 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 20:13:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:13:39,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553478034] [2019-11-23 20:13:39,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:13:39,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:13:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:13:39,436 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:13:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,472 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:13:39,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:39,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:13:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,473 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:13:39,473 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:13:39,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:13:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:13:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:13:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:13:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:13:39,480 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:13:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,481 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:13:39,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:13:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:13:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:13:39,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,482 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,694 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:13:39,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720567020] [2019-11-23 20:13:39,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720567020] [2019-11-23 20:13:39,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845082664] [2019-11-23 20:13:39,832 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 20:13:39,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:39,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:39,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:13:39,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847136545] [2019-11-23 20:13:39,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:39,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:39,941 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:13:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,973 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:13:39,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:13:39,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:13:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,975 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:13:39,975 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:13:39,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:13:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:13:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:13:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:13:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:13:39,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:13:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,984 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:13:39,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:13:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:13:39,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,986 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:40,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:40,198 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:13:40,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:40,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937629483] [2019-11-23 20:13:40,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:40,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937629483] [2019-11-23 20:13:40,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160884745] [2019-11-23 20:13:40,302 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 20:13:40,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:13:40,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:40,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:40,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:13:40,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:40,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:13:40,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476291359] [2019-11-23 20:13:40,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:13:40,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:13:40,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:40,433 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:13:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:40,509 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:13:40,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:40,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:13:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:40,510 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:13:40,511 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:13:40,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:13:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:13:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:13:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:13:40,528 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:13:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:40,532 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:13:40,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:13:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:13:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:13:40,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:40,534 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:40,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:40,735 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:13:40,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:40,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126209309] [2019-11-23 20:13:40,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:40,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126209309] [2019-11-23 20:13:40,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977052331] [2019-11-23 20:13:40,891 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 20:13:40,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:40,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:40,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:40,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:40,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:40,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:13:40,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545283986] [2019-11-23 20:13:40,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:13:40,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:13:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:13:41,000 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:13:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:41,076 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:13:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:13:41,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:13:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:41,078 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:13:41,078 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:13:41,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:13:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:13:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:13:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:13:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:13:41,089 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:13:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:41,089 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:13:41,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:13:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:13:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:13:41,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:41,092 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:41,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:41,297 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:13:41,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:41,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905074264] [2019-11-23 20:13:41,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:41,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905074264] [2019-11-23 20:13:41,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651283167] [2019-11-23 20:13:41,466 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 20:13:41,745 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:13:41,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:41,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:41,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:13:41,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:41,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:13:41,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634746587] [2019-11-23 20:13:41,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:13:41,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:13:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:41,826 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:13:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:41,956 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:13:41,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:13:41,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:13:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:41,958 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:13:41,958 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:13:41,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:13:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:13:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:13:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:13:41,964 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:13:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:41,964 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:13:41,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:13:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:13:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:13:41,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:41,966 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:42,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:42,166 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:13:42,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:42,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706296270] [2019-11-23 20:13:42,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:13:42,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706296270] [2019-11-23 20:13:42,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727955202] [2019-11-23 20:13:42,337 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 20:13:42,706 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:13:42,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:42,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:42,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:13:42,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:42,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:13:42,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522926497] [2019-11-23 20:13:42,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:13:42,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:42,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:13:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:42,787 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:13:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:42,857 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:13:42,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:13:42,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:13:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:42,858 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:13:42,859 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:13:42,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:13:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:13:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:13:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:13:42,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:13:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:42,865 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:13:42,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:13:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:13:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:13:42,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:42,867 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:43,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:43,071 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:13:43,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:43,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487344884] [2019-11-23 20:13:43,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487344884] [2019-11-23 20:13:43,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850212423] [2019-11-23 20:13:43,250 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 20:13:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:13:43,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:13:43,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861256744] [2019-11-23 20:13:43,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:13:43,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:13:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:13:43,341 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:13:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:43,386 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:13:43,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:43,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:13:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:43,387 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:13:43,387 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:13:43,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:13:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:13:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:13:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:13:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:13:43,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:13:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:43,393 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:13:43,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:13:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:13:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:13:43,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:43,394 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:43,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:43,598 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:13:43,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:43,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720379396] [2019-11-23 20:13:43,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720379396] [2019-11-23 20:13:43,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336285940] [2019-11-23 20:13:43,771 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 20:13:43,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:43,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:43,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:13:43,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:13:43,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554073594] [2019-11-23 20:13:43,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:13:43,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:13:43,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:13:43,862 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:13:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:43,911 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:13:43,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:13:43,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:13:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:43,912 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:13:43,912 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:13:43,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:13:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:13:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:13:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:13:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:13:43,917 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:13:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:43,917 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:13:43,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:13:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:13:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:13:43,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:43,919 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:44,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:44,127 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:44,128 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:13:44,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:44,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472632344] [2019-11-23 20:13:44,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:44,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472632344] [2019-11-23 20:13:44,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475038746] [2019-11-23 20:13:44,329 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 20:13:44,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:13:44,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:44,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:44,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:13:44,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:44,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:13:44,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871780901] [2019-11-23 20:13:44,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:44,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:44,500 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:13:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:44,590 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:13:44,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:13:44,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:13:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:44,592 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:13:44,592 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:13:44,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:13:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:13:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:13:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:13:44,597 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:13:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:44,598 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:13:44,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:13:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:13:44,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:44,599 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:44,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:44,803 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:13:44,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:44,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377933548] [2019-11-23 20:13:44,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:13:45,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377933548] [2019-11-23 20:13:45,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51831937] [2019-11-23 20:13:45,007 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 20:13:45,090 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:45,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:45,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:13:45,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:13:45,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:45,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:13:45,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84042106] [2019-11-23 20:13:45,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:13:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:13:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:45,193 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:13:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:45,387 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:13:45,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:45,388 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:13:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:45,389 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:13:45,389 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:13:45,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:13:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:13:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:13:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:13:45,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:13:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:45,395 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:13:45,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:13:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:13:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:13:45,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:45,397 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:45,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:45,608 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:13:45,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:45,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818998592] [2019-11-23 20:13:45,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:13:45,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818998592] [2019-11-23 20:13:45,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601294529] [2019-11-23 20:13:45,839 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 20:13:46,574 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:13:46,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:46,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:46,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:13:46,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:46,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:13:46,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547721460] [2019-11-23 20:13:46,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:13:46,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:13:46,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:46,703 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:13:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:46,920 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:13:46,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:13:46,920 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:13:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:46,922 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:13:46,922 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:13:46,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:13:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:13:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:13:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:13:46,927 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:13:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:46,927 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:13:46,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:13:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:13:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:13:46,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:46,928 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:47,133 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:13:47,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612270147] [2019-11-23 20:13:47,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:13:47,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612270147] [2019-11-23 20:13:47,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974689650] [2019-11-23 20:13:47,369 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 20:13:48,038 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:13:48,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:48,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:48,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:13:48,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:13:48,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865718536] [2019-11-23 20:13:48,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:13:48,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:13:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:48,154 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:13:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,232 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:13:48,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:48,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:13:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,233 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:13:48,233 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:13:48,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:13:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:13:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:13:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:13:48,238 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:13:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,238 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:13:48,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:13:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:13:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:13:48,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,239 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:48,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:48,444 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:13:48,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:48,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811369327] [2019-11-23 20:13:48,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:48,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811369327] [2019-11-23 20:13:48,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560067853] [2019-11-23 20:13:48,686 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 20:13:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:48,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:48,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:13:48,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002077253] [2019-11-23 20:13:48,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:13:48,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:13:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:13:48,788 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:13:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,872 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:13:48,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:13:48,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:13:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,873 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:13:48,873 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:13:48,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:13:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:13:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:13:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:13:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:13:48,879 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:13:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,879 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:13:48,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:13:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:13:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:13:48,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,880 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:49,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:49,090 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:13:49,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:49,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008937837] [2019-11-23 20:13:49,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:49,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008937837] [2019-11-23 20:13:49,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956296904] [2019-11-23 20:13:49,355 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 20:13:49,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:49,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:49,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:13:49,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:49,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:49,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:13:49,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266135322] [2019-11-23 20:13:49,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:49,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:49,447 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:13:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:49,529 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:13:49,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:13:49,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:13:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:49,530 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:13:49,530 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:13:49,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:13:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:13:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:13:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:13:49,535 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:13:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:49,535 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:13:49,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:13:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:13:49,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:49,536 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:49,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:49,745 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:13:49,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:49,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779435641] [2019-11-23 20:13:49,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:50,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779435641] [2019-11-23 20:13:50,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913001365] [2019-11-23 20:13:50,087 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 20:13:50,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:13:50,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:50,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:50,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:13:50,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:50,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:13:50,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987188946] [2019-11-23 20:13:50,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:13:50,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:13:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:50,586 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:13:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:50,825 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:13:50,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:13:50,826 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:13:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:50,826 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:13:50,827 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:13:50,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:13:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:13:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:13:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:13:50,831 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:13:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:50,831 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:13:50,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:13:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:13:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:13:50,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:50,833 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:51,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:51,036 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:13:51,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:51,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413627876] [2019-11-23 20:13:51,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:51,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413627876] [2019-11-23 20:13:51,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392580842] [2019-11-23 20:13:51,369 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 20:13:51,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:51,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:51,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:13:51,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:51,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:51,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:13:51,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49565003] [2019-11-23 20:13:51,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:13:51,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:13:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:13:51,507 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:13:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:51,587 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:13:51,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:51,588 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:13:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:51,589 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:13:51,589 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:13:51,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:13:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:13:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:13:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:13:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:13:51,594 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:13:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:51,594 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:13:51,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:13:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:13:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:13:51,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:51,596 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:51,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:51,800 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:13:51,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:51,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513550307] [2019-11-23 20:13:51,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:52,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513550307] [2019-11-23 20:13:52,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100460949] [2019-11-23 20:13:52,250 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 20:13:54,247 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:13:54,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:54,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:54,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:13:54,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:54,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:13:54,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904251688] [2019-11-23 20:13:54,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:54,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:54,411 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:13:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:54,677 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:13:54,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:54,677 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:13:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:54,678 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:13:54,679 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:13:54,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:13:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:13:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:13:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:13:54,684 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:13:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:54,684 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:13:54,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:13:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:13:54,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:54,685 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:54,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:54,890 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:13:54,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:54,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968457280] [2019-11-23 20:13:54,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:13:55,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968457280] [2019-11-23 20:13:55,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153536926] [2019-11-23 20:13:55,299 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 20:13:56,781 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:13:56,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:56,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:56,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:13:56,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:56,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:13:56,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760006848] [2019-11-23 20:13:56,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:56,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:56,935 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:13:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:57,096 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:13:57,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:57,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:13:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:57,098 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:13:57,098 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:13:57,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:13:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:13:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:13:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:13:57,109 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:13:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:57,110 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:13:57,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:13:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:13:57,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:57,111 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:57,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:57,315 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:57,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:13:57,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:57,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721329899] [2019-11-23 20:13:57,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:57,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721329899] [2019-11-23 20:13:57,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596039867] [2019-11-23 20:13:57,767 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 20:13:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:57,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:13:57,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:57,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:57,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:13:57,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836930358] [2019-11-23 20:13:57,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:13:57,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:13:57,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:57,912 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:13:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:57,994 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:13:57,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:57,994 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:13:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:57,995 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:13:57,996 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:13:57,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:13:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:13:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:13:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:13:58,000 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:13:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:58,001 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:13:58,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:13:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:13:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:13:58,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:58,002 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:58,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:58,205 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:13:58,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:58,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036925668] [2019-11-23 20:13:58,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:58,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036925668] [2019-11-23 20:13:58,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090830673] [2019-11-23 20:13:58,761 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 20:13:58,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:58,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:58,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:13:58,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:58,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:58,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:13:58,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298743786] [2019-11-23 20:13:58,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:13:58,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:13:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:58,878 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:13:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:58,968 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:13:58,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:13:58,968 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:13:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:58,969 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:13:58,969 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:13:58,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:13:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:13:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:13:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:13:58,975 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:13:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:58,975 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:13:58,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:13:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:13:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:13:58,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:58,976 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:59,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:59,177 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:13:59,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:59,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586336903] [2019-11-23 20:13:59,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:59,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586336903] [2019-11-23 20:13:59,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480109445] [2019-11-23 20:13:59,748 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 20:13:59,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:13:59,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:59,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:59,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:14:00,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:00,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:14:00,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055951601] [2019-11-23 20:14:00,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:14:00,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:14:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:14:00,104 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:14:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:00,278 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:14:00,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:14:00,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:14:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:00,279 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:14:00,279 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:14:00,280 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:14:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:14:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:14:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:14:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:14:00,289 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:14:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:00,289 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:14:00,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:14:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:14:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:14:00,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:00,290 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:00,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:00,496 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:14:00,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:00,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278697851] [2019-11-23 20:14:00,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:00,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278697851] [2019-11-23 20:14:00,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175751782] [2019-11-23 20:14:00,928 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 20:14:01,012 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:01,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:01,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:14:01,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:01,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:01,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:14:01,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505150285] [2019-11-23 20:14:01,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:14:01,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:14:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:14:01,046 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:14:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:01,143 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:14:01,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:14:01,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:14:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:01,146 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:14:01,146 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:14:01,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:14:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:14:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:14:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:14:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:14:01,151 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:14:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:01,151 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:14:01,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:14:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:14:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:14:01,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:01,153 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:01,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:01,356 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:14:01,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:01,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119529602] [2019-11-23 20:14:01,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:01,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119529602] [2019-11-23 20:14:01,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583198830] [2019-11-23 20:14:01,949 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 20:14:04,181 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:14:04,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:04,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:04,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:14:04,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:04,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:14:04,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906224822] [2019-11-23 20:14:04,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:14:04,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:14:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:04,403 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:14:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:04,739 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:14:04,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:14:04,739 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:14:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:04,741 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:14:04,741 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:14:04,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:14:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:14:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:14:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:14:04,747 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:14:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:04,747 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:14:04,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:14:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:14:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:14:04,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:04,749 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:04,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:04,954 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:14:04,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:04,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465302911] [2019-11-23 20:14:04,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:14:05,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465302911] [2019-11-23 20:14:05,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254006598] [2019-11-23 20:14:05,428 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 20:14:10,718 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:14:10,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:10,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:10,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:14:10,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:10,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:14:10,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481137384] [2019-11-23 20:14:10,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:14:10,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:14:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:10,935 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:14:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:11,115 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:14:11,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:14:11,116 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:14:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:11,117 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:14:11,117 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:14:11,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:14:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:14:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:14:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:14:11,124 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:14:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:11,125 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:14:11,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:14:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:14:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:14:11,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:11,126 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:11,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:11,334 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:14:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:11,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189517577] [2019-11-23 20:14:11,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:11,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189517577] [2019-11-23 20:14:11,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009569602] [2019-11-23 20:14:11,862 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:11,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:14:11,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:11,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:11,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:14:11,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190337595] [2019-11-23 20:14:11,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:14:11,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:14:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:11,986 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:14:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:12,090 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:14:12,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:14:12,091 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:14:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:12,091 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:14:12,092 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:14:12,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:14:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:14:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:14:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:14:12,097 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:14:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:12,097 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:14:12,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:14:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:14:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:14:12,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:12,098 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:12,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:12,302 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:14:12,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:12,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760733551] [2019-11-23 20:14:12,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:12,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760733551] [2019-11-23 20:14:12,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89410465] [2019-11-23 20:14:12,795 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:12,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:12,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:12,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:14:12,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:12,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:12,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:14:12,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393301878] [2019-11-23 20:14:12,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:14:12,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:14:12,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:12,925 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:14:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:13,049 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:14:13,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:14:13,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:14:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:13,051 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:14:13,051 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:14:13,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:14:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:14:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:14:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:14:13,056 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:14:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:13,056 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:14:13,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:14:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:14:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:14:13,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:13,057 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:13,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:13,260 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:14:13,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:13,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455540572] [2019-11-23 20:14:13,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:13,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455540572] [2019-11-23 20:14:13,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633152991] [2019-11-23 20:14:13,818 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:14,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:14:14,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:14,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:14,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:14:14,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:14,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:14:14,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905473303] [2019-11-23 20:14:14,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:14:14,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:14:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:14,503 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:14:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:14,899 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:14:14,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:14:14,900 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:14:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:14,901 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:14:14,901 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:14:14,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:14:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:14:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:14:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:14:14,908 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:14:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:14,909 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:14:14,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:14:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:14:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:14:14,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:14,910 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:15,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:15,111 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:14:15,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:15,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741804583] [2019-11-23 20:14:15,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:14:15,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741804583] [2019-11-23 20:14:15,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519546934] [2019-11-23 20:14:15,672 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:15,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:15,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:15,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:14:15,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:14:16,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:16,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:14:16,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548060158] [2019-11-23 20:14:16,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:14:16,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:16,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:14:16,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:16,012 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:14:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:16,380 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:14:16,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:14:16,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:14:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:16,381 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:14:16,381 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:14:16,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:14:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:14:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:14:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:14:16,388 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:14:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:16,388 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:14:16,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:14:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:14:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:14:16,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:16,390 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:16,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:16,593 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:14:16,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:16,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524846201] [2019-11-23 20:14:16,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:14:17,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524846201] [2019-11-23 20:14:17,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934631915] [2019-11-23 20:14:17,623 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:55,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:14:55,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:55,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:55,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2019-11-23 20:14:56,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:56,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:14:56,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558984174] [2019-11-23 20:14:56,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:14:56,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:14:56,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:14:56,026 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:14:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:56,468 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:14:56,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:14:56,468 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:14:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:56,470 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:14:56,470 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:14:56,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:14:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:14:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:14:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:14:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:14:56,476 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:14:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:56,477 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:14:56,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:14:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:14:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:14:56,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:56,478 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:56,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:56,691 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:14:56,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:56,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203753243] [2019-11-23 20:14:56,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-11-23 20:14:57,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203753243] [2019-11-23 20:14:57,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110229631] [2019-11-23 20:14:57,616 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:59,187 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:14:59,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:59,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:59,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2019-11-23 20:14:59,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:59,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:14:59,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559162883] [2019-11-23 20:14:59,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:14:59,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:14:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:14:59,432 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 50 states. [2019-11-23 20:14:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:59,670 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:14:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:14:59,670 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 187 [2019-11-23 20:14:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:59,672 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:14:59,672 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:14:59,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:14:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:14:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 20:14:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:14:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:14:59,678 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 187 [2019-11-23 20:14:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:59,678 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:14:59,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:14:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:14:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:14:59,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:59,679 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:59,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:59,884 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1061272234, now seen corresponding path program 37 times [2019-11-23 20:14:59,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:59,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998711377] [2019-11-23 20:14:59,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:15:00,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998711377] [2019-11-23 20:15:00,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448596193] [2019-11-23 20:15:00,531 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:00,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:15:00,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:15:00,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:00,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:15:00,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495298749] [2019-11-23 20:15:00,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:15:00,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:15:00,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:15:00,671 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 41 states. [2019-11-23 20:15:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:00,816 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2019-11-23 20:15:00,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:15:00,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:15:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:00,817 INFO L225 Difference]: With dead ends: 310 [2019-11-23 20:15:00,818 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:15:00,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:15:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:15:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:15:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:15:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:15:00,823 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:15:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:00,823 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:15:00,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:15:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:15:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:15:00,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:00,825 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:01,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:01,028 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 38 times [2019-11-23 20:15:01,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:01,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137165164] [2019-11-23 20:15:01,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:15:01,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137165164] [2019-11-23 20:15:01,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223461498] [2019-11-23 20:15:01,895 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:02,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:02,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:02,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:15:02,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:15:02,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:02,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:15:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181795673] [2019-11-23 20:15:02,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:15:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:15:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:15:02,059 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:15:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:02,197 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:15:02,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:15:02,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:15:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:02,198 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:15:02,199 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:15:02,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:15:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:15:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:15:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:15:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:15:02,203 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:15:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:02,204 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:15:02,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:15:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:15:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:15:02,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:02,205 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:02,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:02,409 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 39 times [2019-11-23 20:15:02,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:02,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601342517] [2019-11-23 20:15:02,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:15:03,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601342517] [2019-11-23 20:15:03,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836143843] [2019-11-23 20:15:03,146 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:03,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:15:03,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:03,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:15:03,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-11-23 20:15:04,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:04,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2019-11-23 20:15:04,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027491150] [2019-11-23 20:15:04,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:15:04,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:15:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:15:04,051 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 54 states. [2019-11-23 20:15:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:04,292 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-11-23 20:15:04,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:15:04,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 195 [2019-11-23 20:15:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:04,294 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:15:04,294 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:15:04,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:15:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:15:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:15:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:15:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:15:04,312 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:15:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:04,313 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:15:04,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:15:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:15:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:15:04,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:04,314 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:04,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:04,518 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 40 times [2019-11-23 20:15:04,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:04,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637678513] [2019-11-23 20:15:04,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:15:05,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637678513] [2019-11-23 20:15:05,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261101420] [2019-11-23 20:15:05,588 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:05,693 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:05,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:05,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:15:05,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2019-11-23 20:15:06,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:06,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2019-11-23 20:15:06,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348223884] [2019-11-23 20:15:06,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:15:06,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:15:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:15:06,216 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 56 states. [2019-11-23 20:15:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:06,560 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 20:15:06,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:15:06,561 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 199 [2019-11-23 20:15:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:06,562 INFO L225 Difference]: With dead ends: 323 [2019-11-23 20:15:06,563 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:15:06,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:15:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:15:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2019-11-23 20:15:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:15:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 20:15:06,574 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 199 [2019-11-23 20:15:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:06,577 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 20:15:06,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:15:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 20:15:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 20:15:06,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:06,579 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:06,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:06,785 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2033644258, now seen corresponding path program 41 times [2019-11-23 20:15:06,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:06,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365659146] [2019-11-23 20:15:06,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:15:07,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365659146] [2019-11-23 20:15:07,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515701893] [2019-11-23 20:15:07,535 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true