java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:09,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:09,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:09,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:09,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:09,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:09,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:09,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:09,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:09,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:09,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:09,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:09,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:09,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:09,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:09,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:09,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:09,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:09,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:09,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:09,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:09,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:09,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:09,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:09,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:45:09,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:45:09,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:45:09,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:45:09,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:45:09,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:45:09,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:09,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:09,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:09,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:09,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:09,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:09,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:09,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:09,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:09,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:09,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:09,186 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 21:45:09,212 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:09,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:09,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:09,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:09,215 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:09,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:09,216 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:09,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:09,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:09,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:09,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:09,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:09,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:09,218 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:09,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:09,218 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:09,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:09,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:09,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:09,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:09,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:09,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:09,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:09,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:09,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:09,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:09,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:09,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:09,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:09,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:09,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:09,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:09,509 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:09,509 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:09,510 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-14 21:45:09,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e978a25/df36da9c604d4aa29034a28d6be5ca8e/FLAG4756317cc [2019-10-14 21:45:10,031 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:10,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-14 21:45:10,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e978a25/df36da9c604d4aa29034a28d6be5ca8e/FLAG4756317cc [2019-10-14 21:45:10,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e978a25/df36da9c604d4aa29034a28d6be5ca8e [2019-10-14 21:45:10,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:10,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:10,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:10,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:10,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:10,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10, skipping insertion in model container [2019-10-14 21:45:10,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,456 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:10,473 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:10,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:10,681 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:10,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:10,725 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:10,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10 WrapperNode [2019-10-14 21:45:10,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:10,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:10,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:10,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:10,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:10,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:10,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:10,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:10,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (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 21:45:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:11,171 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:11,171 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:45:11,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11 BoogieIcfgContainer [2019-10-14 21:45:11,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:11,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:11,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:11,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:11,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:10" (1/3) ... [2019-10-14 21:45:11,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370a7a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (2/3) ... [2019-10-14 21:45:11,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370a7a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11" (3/3) ... [2019-10-14 21:45:11,184 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-10-14 21:45:11,208 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:11,221 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:11,250 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:11,303 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:11,303 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:11,304 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:11,304 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:11,304 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:11,304 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:11,304 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:11,305 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:45:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:45:11,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,337 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,339 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2019-10-14 21:45:11,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545177600] [2019-10-14 21:45:11,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:11,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545177600] [2019-10-14 21:45:11,517 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:11,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:11,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222124978] [2019-10-14 21:45:11,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:11,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:11,541 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:45:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,724 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2019-10-14 21:45:11,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:11,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-14 21:45:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,742 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:45:11,742 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:45:11,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:45:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:45:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:45:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-14 21:45:11,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-10-14 21:45:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,814 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-14 21:45:11,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-14 21:45:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:45:11,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,818 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,818 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2019-10-14 21:45:11,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674873442] [2019-10-14 21:45:11,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:11,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674873442] [2019-10-14 21:45:11,960 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:11,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:11,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515751849] [2019-10-14 21:45:11,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:11,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:11,968 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-14 21:45:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,099 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-14 21:45:12,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:12,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:45:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,101 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:45:12,102 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:45:12,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:45:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:45:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:45:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:45:12,122 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-14 21:45:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,123 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:45:12,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:45:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:12,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,126 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,127 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2019-10-14 21:45:12,129 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815856038] [2019-10-14 21:45:12,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:12,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815856038] [2019-10-14 21:45:12,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414807302] [2019-10-14 21:45:12,243 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 21:45:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:12,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:12,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527392092] [2019-10-14 21:45:12,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:12,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:12,382 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-10-14 21:45:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,532 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-10-14 21:45:12,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:12,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-10-14 21:45:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,534 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:45:12,535 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:45:12,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:45:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:45:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:45:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 21:45:12,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2019-10-14 21:45:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,563 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 21:45:12,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 21:45:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:12,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,567 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,773 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2019-10-14 21:45:12,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083856379] [2019-10-14 21:45:12,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:45:12,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083856379] [2019-10-14 21:45:12,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671231279] [2019-10-14 21:45:12,896 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:12,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:12,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:45:12,967 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:12,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021395233] [2019-10-14 21:45:12,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:12,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:12,969 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2019-10-14 21:45:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,102 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-10-14 21:45:13,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:13,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-14 21:45:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,103 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:45:13,103 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:45:13,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 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 21:45:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:45:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:45:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:45:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-14 21:45:13,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2019-10-14 21:45:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,113 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-14 21:45:13,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-14 21:45:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:45:13,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,114 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] [2019-10-14 21:45:13,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,326 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2019-10-14 21:45:13,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165971749] [2019-10-14 21:45:13,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:13,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165971749] [2019-10-14 21:45:13,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083202337] [2019-10-14 21:45:13,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:13,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:13,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:13,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517761423] [2019-10-14 21:45:13,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:13,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:13,533 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2019-10-14 21:45:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,699 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2019-10-14 21:45:13,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:13,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-14 21:45:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,700 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:45:13,700 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:13,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-10-14 21:45:13,716 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2019-10-14 21:45:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,717 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-10-14 21:45:13,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-10-14 21:45:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:13,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,718 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 21:45:13,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2019-10-14 21:45:13,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971060044] [2019-10-14 21:45:13,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:45:14,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971060044] [2019-10-14 21:45:14,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915688687] [2019-10-14 21:45:14,033 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:14,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:14,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:14,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:45:14,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:14,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:14,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093292582] [2019-10-14 21:45:14,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:14,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:14,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:14,122 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 9 states. [2019-10-14 21:45:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:14,318 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-10-14 21:45:14,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:14,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-14 21:45:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:14,320 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:45:14,320 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:45:14,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 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 21:45:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:45:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-14 21:45:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:45:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-14 21:45:14,329 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2019-10-14 21:45:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:14,330 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-14 21:45:14,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-14 21:45:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:45:14,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:14,332 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 21:45:14,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,545 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2019-10-14 21:45:14,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:14,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801320050] [2019-10-14 21:45:14,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:45:14,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801320050] [2019-10-14 21:45:14,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322650555] [2019-10-14 21:45:14,723 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:20,464 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:20,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:20,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:20,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:45:20,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:20,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:20,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128711255] [2019-10-14 21:45:20,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:20,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:20,509 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 10 states. [2019-10-14 21:45:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:20,654 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2019-10-14 21:45:20,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:20,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-10-14 21:45:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:20,656 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:45:20,656 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:45:20,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:45:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 21:45:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-14 21:45:20,675 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2019-10-14 21:45:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:20,676 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-14 21:45:20,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-14 21:45:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:45:20,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:20,682 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 21:45:20,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:20,884 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2019-10-14 21:45:20,885 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:20,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905988197] [2019-10-14 21:45:20,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:20,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:20,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:21,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905988197] [2019-10-14 21:45:21,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828725666] [2019-10-14 21:45:21,020 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:21,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:21,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:21,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:21,603 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:21,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:21,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585055857] [2019-10-14 21:45:21,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:21,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,609 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 11 states. [2019-10-14 21:45:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:21,776 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-10-14 21:45:21,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:21,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-10-14 21:45:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:21,778 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:45:21,778 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:45:21,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:45:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-14 21:45:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:45:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-10-14 21:45:21,788 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2019-10-14 21:45:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:21,788 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-10-14 21:45:21,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-10-14 21:45:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:45:21,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:21,790 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 21:45:21,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,993 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2019-10-14 21:45:21,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:21,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843077086] [2019-10-14 21:45:21,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:45:22,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843077086] [2019-10-14 21:45:22,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252252422] [2019-10-14 21:45:22,157 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:22,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:45:22,231 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:22,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:22,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098041664] [2019-10-14 21:45:22,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:22,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:22,233 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 12 states. [2019-10-14 21:45:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:22,435 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-10-14 21:45:22,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:22,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-14 21:45:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:22,437 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:45:22,438 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:22,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 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 21:45:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-14 21:45:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:45:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-10-14 21:45:22,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-10-14 21:45:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:22,447 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-10-14 21:45:22,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-10-14 21:45:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:45:22,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,449 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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 21:45:22,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,653 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:22,654 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2019-10-14 21:45:22,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:22,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146634745] [2019-10-14 21:45:22,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:22,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146634745] [2019-10-14 21:45:22,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119563735] [2019-10-14 21:45:22,795 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:45:22,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:22,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:22,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:22,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:22,920 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:22,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:22,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006193194] [2019-10-14 21:45:22,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:22,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:22,923 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 13 states. [2019-10-14 21:45:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,159 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2019-10-14 21:45:23,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:23,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-14 21:45:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,160 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:45:23,161 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:45:23,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 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 21:45:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:45:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-14 21:45:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:45:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-10-14 21:45:23,170 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2019-10-14 21:45:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,170 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-10-14 21:45:23,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-10-14 21:45:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:45:23,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,172 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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 21:45:23,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,383 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2019-10-14 21:45:23,383 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462891439] [2019-10-14 21:45:23,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:45:23,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462891439] [2019-10-14 21:45:23,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415466104] [2019-10-14 21:45:23,569 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:28,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:28,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:28,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:45:28,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 21:45:28,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:28,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-10-14 21:45:28,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248386168] [2019-10-14 21:45:28,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:28,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:28,561 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 15 states. [2019-10-14 21:45:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:28,792 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-10-14 21:45:28,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:28,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2019-10-14 21:45:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:28,793 INFO L225 Difference]: With dead ends: 154 [2019-10-14 21:45:28,794 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:45:28,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:45:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-14 21:45:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:45:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-10-14 21:45:28,801 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2019-10-14 21:45:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:28,802 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-10-14 21:45:28,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-10-14 21:45:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:45:28,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:28,803 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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 21:45:29,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:29,005 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2019-10-14 21:45:29,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236179171] [2019-10-14 21:45:29,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 21:45:29,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236179171] [2019-10-14 21:45:29,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168311326] [2019-10-14 21:45:29,195 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:29,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:29,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:29,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:29,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 21:45:29,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:29,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:29,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428276351] [2019-10-14 21:45:29,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:29,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:29,319 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 15 states. [2019-10-14 21:45:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:29,525 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-10-14 21:45:29,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:29,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2019-10-14 21:45:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:29,526 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:45:29,526 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:45:29,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:45:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-14 21:45:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 21:45:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-10-14 21:45:29,535 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2019-10-14 21:45:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:29,535 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-10-14 21:45:29,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-10-14 21:45:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:45:29,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:29,537 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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 21:45:29,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:29,742 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2019-10-14 21:45:29,743 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053012108] [2019-10-14 21:45:29,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-14 21:45:29,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053012108] [2019-10-14 21:45:29,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204145713] [2019-10-14 21:45:29,911 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true