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/reducercommutativity/avg20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:08,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:08,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:08,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:08,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:08,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:08,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:08,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:08,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:08,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:08,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:08,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:08,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:08,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:08,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:08,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:08,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:08,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:08,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:08,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:08,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:08,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:08,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:08,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:08,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:08,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:08,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:08,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:08,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:08,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:08,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:08,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:08,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:08,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:08,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:08,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:08,174 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 [2019-10-14 23:42:08,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:08,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:08,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:08,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:08,212 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:08,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:08,212 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:08,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:08,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:08,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:08,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:08,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:08,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:08,216 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:08,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:08,216 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:08,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:08,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:08,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:08,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:08,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:08,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:08,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:08,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:08,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:08,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:08,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:08,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:08,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:08,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:08,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:08,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:08,549 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:08,550 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:08,551 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-10-14 23:42:08,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f821a47/f37be04bcbfa4077a594d450cf54bb0d/FLAG793392088 [2019-10-14 23:42:09,079 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:09,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-10-14 23:42:09,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f821a47/f37be04bcbfa4077a594d450cf54bb0d/FLAG793392088 [2019-10-14 23:42:09,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f821a47/f37be04bcbfa4077a594d450cf54bb0d [2019-10-14 23:42:09,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:09,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:09,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:09,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:09,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:09,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7e4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09, skipping insertion in model container [2019-10-14 23:42:09,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,465 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:09,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:09,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:09,701 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:09,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:09,735 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:09,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09 WrapperNode [2019-10-14 23:42:09,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:09,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:09,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:09,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:09,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (1/1) ... [2019-10-14 23:42:09,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:09,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:09,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:09,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:09,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (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 [2019-10-14 23:42:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-10-14 23:42:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:10,204 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:10,205 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:10,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:10 BoogieIcfgContainer [2019-10-14 23:42:10,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:10,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:10,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:10,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:10,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:09" (1/3) ... [2019-10-14 23:42:10,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716f2651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:10, skipping insertion in model container [2019-10-14 23:42:10,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:09" (2/3) ... [2019-10-14 23:42:10,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716f2651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:10, skipping insertion in model container [2019-10-14 23:42:10,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:10" (3/3) ... [2019-10-14 23:42:10,215 INFO L109 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2019-10-14 23:42:10,224 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:10,234 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:10,246 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:10,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:10,273 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:10,273 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:10,273 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:10,273 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:10,273 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:10,273 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:10,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 23:42:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:10,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:10,299 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:10,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-14 23:42:10,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:10,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737342122] [2019-10-14 23:42:10,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:10,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:10,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:10,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737342122] [2019-10-14 23:42:10,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:10,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:10,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399286609] [2019-10-14 23:42:10,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:10,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:10,599 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 23:42:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:10,704 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 23:42:10,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:10,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:10,715 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:42:10,715 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:42:10,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:42:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:42:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:42:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 23:42:10,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 23:42:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:10,760 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 23:42:10,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 23:42:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:10,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:10,763 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:10,764 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-14 23:42:10,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:10,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304412736] [2019-10-14 23:42:10,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:10,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:10,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:42:10,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304412736] [2019-10-14 23:42:10,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753702915] [2019-10-14 23:42:10,939 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 [2019-10-14 23:42:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:11,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:11,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:11,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:42:11,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697122775] [2019-10-14 23:42:11,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:11,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:11,069 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 23:42:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:11,087 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 23:42:11,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:11,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:11,089 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:42:11,089 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:42:11,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:42:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:42:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 23:42:11,098 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 23:42:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:11,099 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 23:42:11,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 23:42:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:11,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:11,101 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:11,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:11,307 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-14 23:42:11,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:11,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123760937] [2019-10-14 23:42:11,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:11,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:11,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:11,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123760937] [2019-10-14 23:42:11,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046055018] [2019-10-14 23:42:11,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:42:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:11,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:11,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:11,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:11,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950210504] [2019-10-14 23:42:11,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:11,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:11,591 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 23:42:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:11,608 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 23:42:11,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:11,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:11,610 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:42:11,610 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:11,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:42:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 23:42:11,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 23:42:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:11,623 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 23:42:11,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 23:42:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:42:11,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:11,627 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:11,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:11,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:11,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-14 23:42:11,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:11,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577177325] [2019-10-14 23:42:11,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:11,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:11,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:42:11,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577177325] [2019-10-14 23:42:11,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297502442] [2019-10-14 23:42:11,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:42:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:12,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:42:12,055 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:12,055 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 23:42:12,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70787329] [2019-10-14 23:42:12,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:12,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:12,060 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 23:42:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:12,085 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 23:42:12,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:12,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 23:42:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:12,088 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:42:12,088 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:12,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:42:12,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 23:42:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:12,106 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:42:12,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:42:12,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:42:12,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:12,112 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:12,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:12,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-14 23:42:12,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:12,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-14 23:42:12,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:42:12,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-14 23:42:12,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110088702] [2019-10-14 23:42:12,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:42:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:12,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 23:42:12,555 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:12,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 23:42:12,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488176397] [2019-10-14 23:42:12,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:12,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:12,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:12,563 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 23:42:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:12,706 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 23:42:12,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:12,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 23:42:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:12,708 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:42:12,709 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:42:12,711 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:42:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 23:42:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 23:42:12,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 23:42:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:12,724 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 23:42:12,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 23:42:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:12,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:12,732 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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] [2019-10-14 23:42:12,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:12,940 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-14 23:42:12,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:12,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734506843] [2019-10-14 23:42:12,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:42:13,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734506843] [2019-10-14 23:42:13,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891818878] [2019-10-14 23:42:13,044 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 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 [2019-10-14 23:42:13,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:13,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:13,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:13,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:42:13,130 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:13,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:13,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887601704] [2019-10-14 23:42:13,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:13,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:13,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:13,132 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 23:42:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:13,222 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 23:42:13,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:13,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:42:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:13,223 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:13,223 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:13,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:42:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:42:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 23:42:13,231 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 23:42:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:13,232 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 23:42:13,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 23:42:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:13,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:13,233 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:13,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:13,441 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-14 23:42:13,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:13,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108678560] [2019-10-14 23:42:13,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:13,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:13,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:42:13,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108678560] [2019-10-14 23:42:13,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600425066] [2019-10-14 23:42:13,575 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 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 [2019-10-14 23:42:13,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:42:13,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:13,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:13,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 23:42:13,693 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:13,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:13,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882270179] [2019-10-14 23:42:13,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:13,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:13,696 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 23:42:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:13,806 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 23:42:13,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:13,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:42:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:13,807 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:42:13,807 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:42:13,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:42:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 23:42:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:42:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:42:13,814 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 23:42:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:13,815 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:42:13,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:42:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:42:13,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:13,816 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:14,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:14,027 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-14 23:42:14,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:14,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883355847] [2019-10-14 23:42:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:14,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:42:14,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883355847] [2019-10-14 23:42:14,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538976805] [2019-10-14 23:42:14,146 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 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 [2019-10-14 23:42:14,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:14,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:14,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:14,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:42:14,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:14,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:42:14,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488500769] [2019-10-14 23:42:14,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:14,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:14,240 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 23:42:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:14,347 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 23:42:14,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:14,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 23:42:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:14,348 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:42:14,349 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:42:14,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:42:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:42:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:42:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:42:14,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 23:42:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:14,360 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:42:14,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:42:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:42:14,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:14,364 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:14,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:14,568 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-14 23:42:14,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:14,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234339310] [2019-10-14 23:42:14,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:14,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:14,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:42:14,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234339310] [2019-10-14 23:42:14,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877588989] [2019-10-14 23:42:14,686 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 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 [2019-10-14 23:42:14,775 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:42:14,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:14,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:14,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:42:14,816 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:14,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:42:14,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535310578] [2019-10-14 23:42:14,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:14,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:14,818 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 23:42:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:14,993 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 23:42:14,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:14,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 23:42:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:14,995 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:42:14,995 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:42:14,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:42:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 23:42:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:42:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 23:42:15,001 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 23:42:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:15,002 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 23:42:15,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 23:42:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:42:15,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:15,003 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:15,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:15,214 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-14 23:42:15,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:15,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954492104] [2019-10-14 23:42:15,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:15,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:15,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 23:42:15,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954492104] [2019-10-14 23:42:15,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185480199] [2019-10-14 23:42:15,346 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 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 [2019-10-14 23:42:15,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:42:15,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:15,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:15,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 23:42:15,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:15,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 23:42:15,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718502817] [2019-10-14 23:42:15,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:15,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:15,545 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 23:42:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:15,746 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 23:42:15,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:15,746 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 23:42:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:15,747 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:42:15,747 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:42:15,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:42:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 23:42:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 23:42:15,754 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 23:42:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:15,755 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 23:42:15,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 23:42:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:42:15,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:15,756 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:15,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:15,960 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-14 23:42:15,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:15,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687453951] [2019-10-14 23:42:15,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:15,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:15,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:16,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687453951] [2019-10-14 23:42:16,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203979076] [2019-10-14 23:42:16,097 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 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 [2019-10-14 23:42:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:16,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:16,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:16,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:16,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175307587] [2019-10-14 23:42:16,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:16,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:16,209 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 23:42:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:16,291 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 23:42:16,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:16,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 23:42:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:16,292 INFO L225 Difference]: With dead ends: 80 [2019-10-14 23:42:16,292 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:42:16,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:42:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 23:42:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:42:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 23:42:16,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 23:42:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:16,298 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 23:42:16,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 23:42:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 23:42:16,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:16,300 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:16,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:16,504 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-14 23:42:16,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:16,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305853650] [2019-10-14 23:42:16,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:16,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:16,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:16,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305853650] [2019-10-14 23:42:16,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477390152] [2019-10-14 23:42:16,634 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 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 [2019-10-14 23:42:16,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:16,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:16,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:16,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:16,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:16,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:16,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326298359] [2019-10-14 23:42:16,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:16,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:16,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:16,732 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 23:42:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:16,843 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 23:42:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:16,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 23:42:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:16,844 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:42:16,844 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:42:16,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:42:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 23:42:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 23:42:16,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 23:42:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:16,850 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 23:42:16,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 23:42:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:42:16,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:16,851 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:17,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:17,055 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-14 23:42:17,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:17,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652019989] [2019-10-14 23:42:17,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:17,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652019989] [2019-10-14 23:42:17,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865106296] [2019-10-14 23:42:17,197 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 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 [2019-10-14 23:42:17,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:17,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:17,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:17,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 23:42:17,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:17,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:42:17,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91255114] [2019-10-14 23:42:17,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:17,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:17,323 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 23:42:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:17,541 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 23:42:17,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:17,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 23:42:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:17,542 INFO L225 Difference]: With dead ends: 87 [2019-10-14 23:42:17,542 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:42:17,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:42:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 23:42:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 23:42:17,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 23:42:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:17,549 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 23:42:17,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 23:42:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:42:17,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:17,550 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:17,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:17,754 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-14 23:42:17,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:17,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10721109] [2019-10-14 23:42:17,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 23:42:17,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10721109] [2019-10-14 23:42:17,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871915630] [2019-10-14 23:42:17,932 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 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 [2019-10-14 23:42:18,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:18,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:18,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:18,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 23:42:18,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:18,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 23:42:18,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972608699] [2019-10-14 23:42:18,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:18,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:18,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:18,117 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 23:42:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:18,369 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 23:42:18,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:18,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 23:42:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:18,370 INFO L225 Difference]: With dead ends: 93 [2019-10-14 23:42:18,371 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:18,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 23:42:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:42:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 23:42:18,377 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 23:42:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:18,378 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 23:42:18,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 23:42:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:42:18,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:18,379 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:18,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:18,580 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-14 23:42:18,581 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:18,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44468909] [2019-10-14 23:42:18,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:18,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:18,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 23:42:18,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44468909] [2019-10-14 23:42:18,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302938745] [2019-10-14 23:42:18,794 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 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 [2019-10-14 23:42:18,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:42:18,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:18,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:18,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 23:42:19,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:19,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 23:42:19,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2610248] [2019-10-14 23:42:19,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:19,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:19,097 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 23:42:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:19,373 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 23:42:19,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:42:19,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 23:42:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:19,375 INFO L225 Difference]: With dead ends: 99 [2019-10-14 23:42:19,375 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:42:19,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:42:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 23:42:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:42:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 23:42:19,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 23:42:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:19,382 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 23:42:19,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 23:42:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:42:19,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:19,383 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:19,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:19,588 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-14 23:42:19,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:19,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545150743] [2019-10-14 23:42:19,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:19,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:19,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:42:19,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545150743] [2019-10-14 23:42:19,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822635623] [2019-10-14 23:42:19,756 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 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 [2019-10-14 23:42:19,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:19,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:19,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:19,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 23:42:19,984 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:19,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 23:42:19,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168973795] [2019-10-14 23:42:19,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:42:19,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:42:19,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:19,986 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 23:42:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:20,212 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 23:42:20,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:20,212 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 23:42:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:20,214 INFO L225 Difference]: With dead ends: 105 [2019-10-14 23:42:20,214 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:42:20,215 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:42:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 23:42:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:42:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 23:42:20,221 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 23:42:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:20,222 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 23:42:20,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:42:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 23:42:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:42:20,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:20,223 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:20,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:20,430 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-14 23:42:20,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:20,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641029828] [2019-10-14 23:42:20,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:20,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:20,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:42:20,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641029828] [2019-10-14 23:42:20,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279762907] [2019-10-14 23:42:20,647 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 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 [2019-10-14 23:42:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:20,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:20,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:42:20,778 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:20,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:42:20,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13378049] [2019-10-14 23:42:20,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:42:20,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:20,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:42:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:20,780 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 23:42:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:20,907 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 23:42:20,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:20,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 23:42:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:20,908 INFO L225 Difference]: With dead ends: 108 [2019-10-14 23:42:20,909 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:42:20,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:42:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 23:42:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:42:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 23:42:20,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 23:42:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:20,915 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 23:42:20,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:42:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 23:42:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:42:20,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:20,917 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:21,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:21,118 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-14 23:42:21,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:21,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041941177] [2019-10-14 23:42:21,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:21,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:21,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:42:21,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041941177] [2019-10-14 23:42:21,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160471635] [2019-10-14 23:42:21,343 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 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 [2019-10-14 23:42:21,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:21,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:21,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:42:21,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:42:21,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:21,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:42:21,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984734921] [2019-10-14 23:42:21,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:21,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:21,475 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 23:42:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:21,622 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 23:42:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:42:21,623 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 23:42:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:21,623 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:42:21,624 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:42:21,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:42:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:42:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 23:42:21,630 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 23:42:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:21,630 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 23:42:21,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 23:42:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:42:21,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:21,631 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:21,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:21,835 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-14 23:42:21,836 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:21,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797972582] [2019-10-14 23:42:21,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:21,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:21,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:42:22,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797972582] [2019-10-14 23:42:22,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133957848] [2019-10-14 23:42:22,049 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 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 [2019-10-14 23:42:22,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:42:22,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:22,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:22,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 23:42:22,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:22,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 23:42:22,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209431969] [2019-10-14 23:42:22,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:22,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:22,287 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 23:42:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:22,554 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 23:42:22,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:22,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 23:42:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:22,556 INFO L225 Difference]: With dead ends: 115 [2019-10-14 23:42:22,556 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 23:42:22,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 23:42:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 23:42:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 23:42:22,561 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 23:42:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:22,562 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 23:42:22,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 23:42:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:42:22,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:22,563 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:22,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:22,769 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-14 23:42:22,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:22,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437100873] [2019-10-14 23:42:22,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:22,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:22,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:42:23,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437100873] [2019-10-14 23:42:23,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407489763] [2019-10-14 23:42:23,086 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 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 [2019-10-14 23:42:23,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:23,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:23,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:23,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:42:23,214 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:23,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:42:23,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966461928] [2019-10-14 23:42:23,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:23,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:23,217 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 23:42:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:23,400 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 23:42:23,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:23,400 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 23:42:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:23,401 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:42:23,402 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:42:23,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:42:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 23:42:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:42:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 23:42:23,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 23:42:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:23,412 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 23:42:23,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 23:42:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:42:23,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:23,414 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:23,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:23,620 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-14 23:42:23,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:23,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728466742] [2019-10-14 23:42:23,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:23,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:23,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:42:23,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728466742] [2019-10-14 23:42:23,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827036940] [2019-10-14 23:42:23,889 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 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 [2019-10-14 23:42:24,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:42:24,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:24,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:24,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 23:42:24,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:24,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 23:42:24,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287965641] [2019-10-14 23:42:24,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:42:24,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:42:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:42:24,849 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 23:42:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:25,226 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 23:42:25,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:42:25,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 23:42:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:25,233 INFO L225 Difference]: With dead ends: 123 [2019-10-14 23:42:25,233 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 23:42:25,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:42:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 23:42:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 23:42:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:42:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 23:42:25,238 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 23:42:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:25,238 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 23:42:25,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:42:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 23:42:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:42:25,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:25,239 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:25,446 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-14 23:42:25,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:25,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576810304] [2019-10-14 23:42:25,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:25,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:25,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 23:42:25,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576810304] [2019-10-14 23:42:25,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116727109] [2019-10-14 23:42:25,715 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 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 [2019-10-14 23:42:26,148 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:42:26,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:26,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:42:26,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 23:42:26,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:26,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 23:42:26,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851674394] [2019-10-14 23:42:26,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:42:26,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:42:26,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:42:26,278 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 23:42:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:26,568 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 23:42:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:42:26,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 23:42:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:26,572 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:42:26,572 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:42:26,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:42:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:42:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 23:42:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 23:42:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 23:42:26,579 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 23:42:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:26,579 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 23:42:26,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:42:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 23:42:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:42:26,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:26,581 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:26,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:26,786 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:26,787 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-10-14 23:42:26,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:26,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901938495] [2019-10-14 23:42:26,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:26,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:26,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 23:42:27,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901938495] [2019-10-14 23:42:27,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080133248] [2019-10-14 23:42:27,105 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 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 [2019-10-14 23:42:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:42:27,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 23:42:27,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:27,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:42:27,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572007285] [2019-10-14 23:42:27,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:27,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:27,268 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 23:42:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:27,462 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-10-14 23:42:27,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:27,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 23:42:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:27,464 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:42:27,464 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:42:27,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:42:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-14 23:42:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:42:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 23:42:27,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 23:42:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:27,472 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 23:42:27,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 23:42:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 23:42:27,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:27,474 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:27,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:27,675 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-10-14 23:42:27,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:27,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208461521] [2019-10-14 23:42:27,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:27,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:27,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2019-10-14 23:42:27,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208461521] [2019-10-14 23:42:27,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566519392] [2019-10-14 23:42:27,852 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 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 [2019-10-14 23:42:27,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:27,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:27,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:27,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2019-10-14 23:42:28,007 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:28,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-10-14 23:42:28,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947263622] [2019-10-14 23:42:28,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:28,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:28,008 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 11 states. [2019-10-14 23:42:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:28,238 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2019-10-14 23:42:28,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:28,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 126 [2019-10-14 23:42:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:28,240 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:42:28,240 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:42:28,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:42:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 23:42:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:42:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 23:42:28,248 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 23:42:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:28,249 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 23:42:28,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 23:42:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:28,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:28,250 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:28,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:28,454 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash 894338583, now seen corresponding path program 21 times [2019-10-14 23:42:28,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:28,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811149560] [2019-10-14 23:42:28,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-10-14 23:42:28,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811149560] [2019-10-14 23:42:28,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838947253] [2019-10-14 23:42:28,596 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 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 [2019-10-14 23:42:28,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:42:28,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:28,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:28,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 298 proven. 36 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-10-14 23:42:28,807 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:28,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2019-10-14 23:42:28,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613670368] [2019-10-14 23:42:28,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:28,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:28,808 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 19 states. [2019-10-14 23:42:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:29,112 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2019-10-14 23:42:29,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:29,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2019-10-14 23:42:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:29,114 INFO L225 Difference]: With dead ends: 140 [2019-10-14 23:42:29,114 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:42:29,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:42:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:42:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 23:42:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:42:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-14 23:42:29,125 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 132 [2019-10-14 23:42:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:29,126 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-14 23:42:29,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-14 23:42:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 23:42:29,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:29,127 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:29,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:29,329 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1927690349, now seen corresponding path program 22 times [2019-10-14 23:42:29,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:29,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345135488] [2019-10-14 23:42:29,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 449 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2019-10-14 23:42:29,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345135488] [2019-10-14 23:42:29,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92352487] [2019-10-14 23:42:29,497 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 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 [2019-10-14 23:42:29,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:29,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:29,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:42:29,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2019-10-14 23:42:29,654 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:29,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-10-14 23:42:29,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697918634] [2019-10-14 23:42:29,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:29,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:29,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:29,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:29,656 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 13 states. [2019-10-14 23:42:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:29,909 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2019-10-14 23:42:29,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:29,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 140 [2019-10-14 23:42:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:29,910 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:42:29,910 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 23:42:29,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 23:42:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 23:42:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:42:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 23:42:29,915 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 140 [2019-10-14 23:42:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:29,916 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 23:42:29,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 23:42:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 23:42:29,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:29,917 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:30,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:30,121 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:30,121 INFO L82 PathProgramCache]: Analyzing trace with hash -573665775, now seen corresponding path program 23 times [2019-10-14 23:42:30,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:30,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074159773] [2019-10-14 23:42:30,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 548 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-14 23:42:30,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074159773] [2019-10-14 23:42:30,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351134162] [2019-10-14 23:42:30,293 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 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 [2019-10-14 23:42:32,855 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-14 23:42:32,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:32,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:32,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 444 proven. 100 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2019-10-14 23:42:32,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:32,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2019-10-14 23:42:32,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694815841] [2019-10-14 23:42:32,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:32,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:32,877 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 14 states. [2019-10-14 23:42:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,139 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2019-10-14 23:42:33,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:33,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 146 [2019-10-14 23:42:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,140 INFO L225 Difference]: With dead ends: 149 [2019-10-14 23:42:33,140 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:42:33,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:42:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:42:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 23:42:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:42:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-14 23:42:33,144 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 146 [2019-10-14 23:42:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,144 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-14 23:42:33,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-14 23:42:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:42:33,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,145 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:33,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,354 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash -373178865, now seen corresponding path program 24 times [2019-10-14 23:42:33,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837471262] [2019-10-14 23:42:33,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2019-10-14 23:42:33,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837471262] [2019-10-14 23:42:33,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727101899] [2019-10-14 23:42:33,608 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 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 [2019-10-14 23:42:34,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 23:42:34,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 538 proven. 49 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2019-10-14 23:42:35,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2019-10-14 23:42:35,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075307512] [2019-10-14 23:42:35,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:42:35,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:42:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:35,015 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 23 states. [2019-10-14 23:42:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,425 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2019-10-14 23:42:35,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:35,429 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2019-10-14 23:42:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,429 INFO L225 Difference]: With dead ends: 156 [2019-10-14 23:42:35,430 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 23:42:35,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:42:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 23:42:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-14 23:42:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:42:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-14 23:42:35,435 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 152 [2019-10-14 23:42:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,435 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-14 23:42:35,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:42:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-14 23:42:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:42:35,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,437 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:35,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,642 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 303396491, now seen corresponding path program 25 times [2019-10-14 23:42:35,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:35,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257320759] [2019-10-14 23:42:35,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 0 proven. 776 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-10-14 23:42:35,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257320759] [2019-10-14 23:42:35,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817775391] [2019-10-14 23:42:35,893 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 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 [2019-10-14 23:42:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:42:36,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 628 proven. 144 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-10-14 23:42:36,104 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:36,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-10-14 23:42:36,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293457163] [2019-10-14 23:42:36,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:36,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:36,106 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 16 states. [2019-10-14 23:42:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,398 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2019-10-14 23:42:36,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:36,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 160 [2019-10-14 23:42:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,400 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:42:36,401 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:42:36,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:42:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:42:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:42:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:42:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 23:42:36,407 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2019-10-14 23:42:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,407 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 23:42:36,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 23:42:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:42:36,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,408 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:36,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,613 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1141948937, now seen corresponding path program 26 times [2019-10-14 23:42:36,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039646767] [2019-10-14 23:42:36,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 0 proven. 905 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2019-10-14 23:42:36,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039646767] [2019-10-14 23:42:36,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422897411] [2019-10-14 23:42:36,875 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 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 [2019-10-14 23:42:37,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:37,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-10-14 23:42:37,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2019-10-14 23:42:37,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033321468] [2019-10-14 23:42:37,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:42:37,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:42:37,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:42:37,087 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 17 states. [2019-10-14 23:42:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,533 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2019-10-14 23:42:37,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:37,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2019-10-14 23:42:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,535 INFO L225 Difference]: With dead ends: 165 [2019-10-14 23:42:37,535 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 23:42:37,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 23:42:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 23:42:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 23:42:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 23:42:37,543 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 166 [2019-10-14 23:42:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,543 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 23:42:37,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:42:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 23:42:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:42:37,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,545 INFO L380 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:37,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,749 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,750 INFO L82 PathProgramCache]: Analyzing trace with hash 596719367, now seen corresponding path program 27 times [2019-10-14 23:42:37,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357105419] [2019-10-14 23:42:37,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2019-10-14 23:42:38,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357105419] [2019-10-14 23:42:38,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581196667] [2019-10-14 23:42:38,042 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 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 [2019-10-14 23:42:38,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:42:38,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:38,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 850 proven. 64 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2019-10-14 23:42:38,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-10-14 23:42:38,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104390365] [2019-10-14 23:42:38,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:38,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:38,523 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 27 states. [2019-10-14 23:42:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,010 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2019-10-14 23:42:39,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:39,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 172 [2019-10-14 23:42:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,012 INFO L225 Difference]: With dead ends: 172 [2019-10-14 23:42:39,012 INFO L226 Difference]: Without dead ends: 113 [2019-10-14 23:42:39,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:42:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-14 23:42:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2019-10-14 23:42:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 23:42:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-14 23:42:39,019 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 172 [2019-10-14 23:42:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,019 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-14 23:42:39,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-14 23:42:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:42:39,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,020 INFO L380 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:39,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,225 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1819813507, now seen corresponding path program 28 times [2019-10-14 23:42:39,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802313752] [2019-10-14 23:42:39,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2019-10-14 23:42:39,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802313752] [2019-10-14 23:42:39,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488404210] [2019-10-14 23:42:39,591 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 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 [2019-10-14 23:42:39,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:39,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2019-10-14 23:42:39,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2019-10-14 23:42:39,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145030480] [2019-10-14 23:42:39,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:39,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:39,785 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 19 states. [2019-10-14 23:42:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,193 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2019-10-14 23:42:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:40,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2019-10-14 23:42:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,195 INFO L225 Difference]: With dead ends: 177 [2019-10-14 23:42:40,195 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 23:42:40,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:42:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 23:42:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-10-14 23:42:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 23:42:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 23:42:40,205 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 180 [2019-10-14 23:42:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,207 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 23:42:40,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 23:42:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 23:42:40,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,209 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,414 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1108145921, now seen corresponding path program 29 times [2019-10-14 23:42:40,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061103610] [2019-10-14 23:42:40,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2896 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2019-10-14 23:42:40,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061103610] [2019-10-14 23:42:40,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588928528] [2019-10-14 23:42:40,690 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 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