/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:48:06,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:48:06,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:48:06,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:48:06,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:48:06,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:48:06,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:48:06,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:48:06,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:48:06,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:48:06,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:48:06,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:48:06,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:48:06,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:48:06,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:48:06,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:48:06,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:48:06,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:48:06,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:48:06,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:48:06,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:48:06,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:48:06,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:48:06,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:48:06,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 18:48:06,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 18:48:06,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 18:48:06,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 18:48:06,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 18:48:06,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 18:48:06,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:48:06,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:48:06,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:48:06,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:48:06,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:48:06,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:48:06,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:48:06,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:48:06,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:48:06,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:48:06,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:48:06,182 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 [2019-11-06 18:48:06,200 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:48:06,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:48:06,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:48:06,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:48:06,203 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:48:06,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:48:06,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:48:06,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:48:06,206 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:48:06,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:48:06,206 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:48:06,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:48:06,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:48:06,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:48:06,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:48:06,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:48:06,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:48:06,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:48:06,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:48:06,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:48:06,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:48:06,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:48:06,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:48:06,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:48:06,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:48:06,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:48:06,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:48:06,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:48:06,537 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:48:06,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-06 18:48:06,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68da78db9/b9bcefad7b204a3cacf21a12860da95a/FLAG6ef45675d [2019-11-06 18:48:07,093 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:48:07,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-06 18:48:07,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68da78db9/b9bcefad7b204a3cacf21a12860da95a/FLAG6ef45675d [2019-11-06 18:48:07,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68da78db9/b9bcefad7b204a3cacf21a12860da95a [2019-11-06 18:48:07,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:48:07,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:48:07,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:07,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:48:07,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:48:07,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb11382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07, skipping insertion in model container [2019-11-06 18:48:07,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:48:07,551 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:48:07,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:07,768 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:48:07,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:07,805 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:48:07,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07 WrapperNode [2019-11-06 18:48:07,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:07,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:48:07,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:48:07,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:48:07,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (1/1) ... [2019-11-06 18:48:07,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:48:07,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:48:07,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:48:07,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:48:07,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (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 [2019-11-06 18:48:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:48:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:48:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:48:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:48:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:48:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:48:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:48:08,273 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:48:08,273 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:48:08,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:08 BoogieIcfgContainer [2019-11-06 18:48:08,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:48:08,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:48:08,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:48:08,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:48:08,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:48:07" (1/3) ... [2019-11-06 18:48:08,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bd50ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:08, skipping insertion in model container [2019-11-06 18:48:08,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:07" (2/3) ... [2019-11-06 18:48:08,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bd50ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:08, skipping insertion in model container [2019-11-06 18:48:08,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:08" (3/3) ... [2019-11-06 18:48:08,297 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2019-11-06 18:48:08,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:48:08,331 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:48:08,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:48:08,374 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:48:08,374 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:48:08,374 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:48:08,374 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:48:08,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:48:08,375 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:48:08,375 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:48:08,375 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:48:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:48:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:48:08,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:08,399 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:08,401 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:48:08,414 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:08,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394916347] [2019-11-06 18:48:08,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:08,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394916347] [2019-11-06 18:48:08,578 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:08,578 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:48:08,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862374967] [2019-11-06 18:48:08,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:48:08,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:48:08,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:48:08,599 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:48:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:08,697 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:48:08,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:48:08,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:48:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:08,707 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:48:08,707 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:48:08,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:48:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:48:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:48:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:48:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:48:08,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:48:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:08,755 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:48:08,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:48:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:48:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:48:08,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:08,757 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:08,757 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:48:08,758 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:08,759 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531825497] [2019-11-06 18:48:08,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:08,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531825497] [2019-11-06 18:48:08,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:08,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:48:08,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685149062] [2019-11-06 18:48:08,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:48:08,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:48:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:08,855 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:48:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:08,960 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:48:08,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:08,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:48:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:08,963 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:48:08,963 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:48:08,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:48:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:48:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:48:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:48:08,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:48:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:08,975 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:48:08,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:48:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:48:08,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:08,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:08,979 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:08,980 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:48:08,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:08,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661029196] [2019-11-06 18:48:08,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:09,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661029196] [2019-11-06 18:48:09,075 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:09,075 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:48:09,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328480633] [2019-11-06 18:48:09,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:48:09,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:09,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:48:09,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:09,077 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:48:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:09,149 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:48:09,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:09,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:48:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:09,152 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:48:09,152 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:48:09,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:48:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:48:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:48:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:48:09,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:48:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:09,163 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:48:09,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:48:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:48:09,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:09,165 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:09,165 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:48:09,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:09,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415832679] [2019-11-06 18:48:09,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:09,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415832679] [2019-11-06 18:48:09,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807613538] [2019-11-06 18:48:09,246 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 [2019-11-06 18:48:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:48:09,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:09,388 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:09,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:48:09,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309657398] [2019-11-06 18:48:09,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:48:09,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:48:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:09,391 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:48:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:09,515 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:48:09,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:48:09,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:48:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:09,517 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:48:09,517 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:48:09,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:48:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:48:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:48:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:48:09,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:48:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:09,524 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:48:09,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:48:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:48:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:48:09,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:09,526 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:09,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:09,731 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:48:09,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:09,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419197842] [2019-11-06 18:48:09,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:48:09,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419197842] [2019-11-06 18:48:09,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842394897] [2019-11-06 18:48:09,827 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 [2019-11-06 18:48:09,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:09,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:09,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:09,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:48:09,933 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:09,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:48:09,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385656783] [2019-11-06 18:48:09,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:48:09,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:48:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:09,936 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-06 18:48:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:10,067 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-11-06 18:48:10,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:48:10,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 18:48:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:10,069 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:48:10,069 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:48:10,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:48:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:48:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:48:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:48:10,076 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-11-06 18:48:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:10,077 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:48:10,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:48:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:48:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:48:10,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:10,078 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:10,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:10,289 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-11-06 18:48:10,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:10,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825259921] [2019-11-06 18:48:10,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:10,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825259921] [2019-11-06 18:48:10,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342339766] [2019-11-06 18:48:10,410 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 [2019-11-06 18:48:10,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:48:10,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:10,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:10,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:10,482 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:10,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:48:10,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132601928] [2019-11-06 18:48:10,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:48:10,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:48:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:10,483 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-06 18:48:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:10,613 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-06 18:48:10,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:48:10,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:48:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:10,615 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:48:10,615 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:48:10,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:48:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-11-06 18:48:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:48:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:48:10,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-11-06 18:48:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:10,623 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:48:10,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:48:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:48:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:48:10,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:10,624 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:10,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:10,826 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-11-06 18:48:10,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:10,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440028418] [2019-11-06 18:48:10,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:10,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440028418] [2019-11-06 18:48:10,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176772123] [2019-11-06 18:48:10,955 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 [2019-11-06 18:48:11,010 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:11,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:11,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:11,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:48:11,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:11,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-06 18:48:11,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590388481] [2019-11-06 18:48:11,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:48:11,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:48:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:11,110 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-11-06 18:48:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:11,289 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-06 18:48:11,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:48:11,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2019-11-06 18:48:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:11,290 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:48:11,290 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:48:11,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:48:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2019-11-06 18:48:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:48:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 18:48:11,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2019-11-06 18:48:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:11,298 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 18:48:11,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:48:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 18:48:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:48:11,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:11,299 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:11,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:11,502 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:11,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1290022011, now seen corresponding path program 5 times [2019-11-06 18:48:11,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:11,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540810180] [2019-11-06 18:48:11,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:48:11,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540810180] [2019-11-06 18:48:11,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291841655] [2019-11-06 18:48:11,647 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 [2019-11-06 18:48:11,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:48:11,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:11,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:48:11,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:48:12,017 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:12,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2019-11-06 18:48:12,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186293672] [2019-11-06 18:48:12,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:48:12,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:48:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:12,019 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 20 states. [2019-11-06 18:48:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:12,220 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-11-06 18:48:12,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:48:12,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-11-06 18:48:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:12,222 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:48:12,222 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:48:12,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:48:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2019-11-06 18:48:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:48:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-06 18:48:12,237 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2019-11-06 18:48:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:12,237 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-06 18:48:12,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:48:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-06 18:48:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:48:12,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:12,241 INFO L410 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:12,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:12,448 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:12,448 INFO L82 PathProgramCache]: Analyzing trace with hash 678305990, now seen corresponding path program 6 times [2019-11-06 18:48:12,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:12,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325198682] [2019-11-06 18:48:12,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:12,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325198682] [2019-11-06 18:48:12,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269545373] [2019-11-06 18:48:12,562 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 [2019-11-06 18:48:12,803 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:48:12,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:12,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:12,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:12,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:12,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:48:12,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996993701] [2019-11-06 18:48:12,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:48:12,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:48:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:12,825 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-11-06 18:48:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:13,023 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-11-06 18:48:13,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:48:13,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 18:48:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:13,025 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:48:13,025 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:48:13,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:48:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-11-06 18:48:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:48:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-06 18:48:13,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-06 18:48:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:13,035 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-06 18:48:13,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:48:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-06 18:48:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:48:13,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:13,036 INFO L410 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:13,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:13,248 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1729755721, now seen corresponding path program 7 times [2019-11-06 18:48:13,249 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:13,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541609394] [2019-11-06 18:48:13,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:13,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541609394] [2019-11-06 18:48:13,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026879319] [2019-11-06 18:48:13,392 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 [2019-11-06 18:48:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:13,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:48:13,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:48:13,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:13,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 27 [2019-11-06 18:48:13,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518572543] [2019-11-06 18:48:13,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:48:13,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:48:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:48:13,634 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 27 states. [2019-11-06 18:48:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:13,917 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2019-11-06 18:48:13,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:48:13,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2019-11-06 18:48:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:13,919 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:48:13,919 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:48:13,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:48:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:48:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2019-11-06 18:48:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:48:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-06 18:48:13,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 38 [2019-11-06 18:48:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:13,928 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-06 18:48:13,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:48:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-06 18:48:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:48:13,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:13,929 INFO L410 BasicCegarLoop]: trace histogram [23, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:14,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:14,130 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -53699638, now seen corresponding path program 8 times [2019-11-06 18:48:14,131 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:14,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471720160] [2019-11-06 18:48:14,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 18:48:14,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471720160] [2019-11-06 18:48:14,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309749831] [2019-11-06 18:48:14,299 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 [2019-11-06 18:48:14,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:14,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:14,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:48:14,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:48:14,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:14,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26] total 34 [2019-11-06 18:48:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183408266] [2019-11-06 18:48:14,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 18:48:14,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 18:48:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=593, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:48:14,757 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 34 states. [2019-11-06 18:48:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:15,113 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2019-11-06 18:48:15,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 18:48:15,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2019-11-06 18:48:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:15,115 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:48:15,115 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:48:15,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=593, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:48:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:48:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2019-11-06 18:48:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:48:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-06 18:48:15,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 46 [2019-11-06 18:48:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:15,126 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-06 18:48:15,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 18:48:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-06 18:48:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:48:15,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:15,127 INFO L410 BasicCegarLoop]: trace histogram [30, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:15,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:15,338 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1314604649, now seen corresponding path program 9 times [2019-11-06 18:48:15,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:15,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358319703] [2019-11-06 18:48:15,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-06 18:48:15,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358319703] [2019-11-06 18:48:15,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462193853] [2019-11-06 18:48:15,483 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 [2019-11-06 18:48:16,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:48:16,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:16,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:48:16,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-06 18:48:16,179 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:16,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:48:16,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207572590] [2019-11-06 18:48:16,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:48:16,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:48:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:16,181 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 14 states. [2019-11-06 18:48:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:16,367 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2019-11-06 18:48:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:48:16,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-06 18:48:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:16,370 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:48:16,370 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:48:16,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:48:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-11-06 18:48:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 18:48:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-11-06 18:48:16,379 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2019-11-06 18:48:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:16,380 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-11-06 18:48:16,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:48:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-11-06 18:48:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:48:16,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:16,381 INFO L410 BasicCegarLoop]: trace histogram [30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:16,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:16,593 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -19822330, now seen corresponding path program 10 times [2019-11-06 18:48:16,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:16,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707024653] [2019-11-06 18:48:16,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-06 18:48:16,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707024653] [2019-11-06 18:48:16,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456214911] [2019-11-06 18:48:16,744 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 [2019-11-06 18:48:16,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:16,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:16,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 18:48:16,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:48:17,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:17,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 33] total 42 [2019-11-06 18:48:17,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616900455] [2019-11-06 18:48:17,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:48:17,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:48:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=901, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:48:17,180 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 42 states. [2019-11-06 18:48:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:17,505 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2019-11-06 18:48:17,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:48:17,505 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 55 [2019-11-06 18:48:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:17,506 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:48:17,507 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:48:17,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=821, Invalid=901, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:48:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:48:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2019-11-06 18:48:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:48:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-11-06 18:48:17,517 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 55 [2019-11-06 18:48:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:17,517 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-11-06 18:48:17,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:48:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-11-06 18:48:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 18:48:17,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:17,518 INFO L410 BasicCegarLoop]: trace histogram [38, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:17,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:17,723 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1728612361, now seen corresponding path program 11 times [2019-11-06 18:48:17,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:17,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594484923] [2019-11-06 18:48:17,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-06 18:48:17,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594484923] [2019-11-06 18:48:17,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433894162] [2019-11-06 18:48:17,916 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