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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:03,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:03,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:04,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:04,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:04,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:04,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:04,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:04,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:04,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:04,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:04,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:04,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:04,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:04,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:04,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:04,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:04,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:04,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:04,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:04,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:04,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:04,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:04,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:04,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:04,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:04,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:04,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:04,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:04,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:04,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:04,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:04,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:04,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:04,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:04,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:04,041 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 21:46:04,056 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:04,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:04,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:04,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:04,058 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:04,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:04,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:04,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:04,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:04,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:04,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:04,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:04,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:04,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:04,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:04,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:04,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:04,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:04,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:04,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:04,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:04,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:04,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:04,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:04,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:04,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:04,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:04,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:04,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:04,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:04,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:04,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:04,441 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:04,441 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:04,442 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-10-14 21:46:04,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b3eeb78/08b073d23d014059b198d1777323739e/FLAG56e487518 [2019-10-14 21:46:04,964 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:04,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-10-14 21:46:04,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b3eeb78/08b073d23d014059b198d1777323739e/FLAG56e487518 [2019-10-14 21:46:05,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b3eeb78/08b073d23d014059b198d1777323739e [2019-10-14 21:46:05,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:05,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:05,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:05,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:05,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:05,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05, skipping insertion in model container [2019-10-14 21:46:05,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,385 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:05,404 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:05,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,612 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:05,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,651 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:05,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05 WrapperNode [2019-10-14 21:46:05,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:05,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:05,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:05,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:05,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:05,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:05,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (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 21:46:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:06,180 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:06,180 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:06,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:06 BoogieIcfgContainer [2019-10-14 21:46:06,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:06,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:06,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:06,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:06,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:05" (1/3) ... [2019-10-14 21:46:06,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6921426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:06, skipping insertion in model container [2019-10-14 21:46:06,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (2/3) ... [2019-10-14 21:46:06,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6921426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:06, skipping insertion in model container [2019-10-14 21:46:06,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:06" (3/3) ... [2019-10-14 21:46:06,190 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2019-10-14 21:46:06,203 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:06,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:06,237 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:06,274 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:06,274 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:06,274 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:06,274 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:06,275 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:06,275 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:06,275 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:06,275 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:46:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:06,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,299 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,301 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1554617121, now seen corresponding path program 1 times [2019-10-14 21:46:06,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18720694] [2019-10-14 21:46:06,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,484 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 21:46:06,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18720694] [2019-10-14 21:46:06,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:06,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555213787] [2019-10-14 21:46:06,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:06,490 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:06,509 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:46:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,653 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-10-14 21:46:06,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:06,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,667 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:46:06,668 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:46:06,677 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 21:46:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:46:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:46:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:46:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-14 21:46:06,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-14 21:46:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,734 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-14 21:46:06,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-14 21:46:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:06,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,737 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,737 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1658163888, now seen corresponding path program 1 times [2019-10-14 21:46:06,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753184038] [2019-10-14 21:46:06,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,856 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 21:46:06,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753184038] [2019-10-14 21:46:06,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:06,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284428618] [2019-10-14 21:46:06,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:06,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,860 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-14 21:46:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,942 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:06,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:06,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,945 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:06,945 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:46:06,946 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 21:46:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:46:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-14 21:46:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:46:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:46:06,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2019-10-14 21:46:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,955 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:46:06,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:46:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:06,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,956 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] [2019-10-14 21:46:06,957 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1238952957, now seen corresponding path program 1 times [2019-10-14 21:46:06,958 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691226129] [2019-10-14 21:46:06,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:07,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691226129] [2019-10-14 21:46:07,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199405404] [2019-10-14 21:46:07,061 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 21:46:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:07,174 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:07,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510113774] [2019-10-14 21:46:07,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:07,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:07,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:07,177 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:46:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,286 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-14 21:46:07,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:07,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:46:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,288 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:46:07,288 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:46:07,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 21:46:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:46:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 21:46:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:46:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-14 21:46:07,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-10-14 21:46:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,303 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-14 21:46:07,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-14 21:46:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:46:07,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,305 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,511 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1418090540, now seen corresponding path program 2 times [2019-10-14 21:46:07,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66781823] [2019-10-14 21:46:07,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:07,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66781823] [2019-10-14 21:46:07,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957547786] [2019-10-14 21:46:07,639 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 21:46:07,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:07,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:07,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:07,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076005172] [2019-10-14 21:46:07,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:07,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:07,734 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-10-14 21:46:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,835 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-10-14 21:46:07,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:07,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 21:46:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,837 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:46:07,837 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:46:07,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 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 21:46:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:46:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-10-14 21:46:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:46:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 21:46:07,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2019-10-14 21:46:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,845 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 21:46:07,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 21:46:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:46:07,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,847 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,050 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 358687009, now seen corresponding path program 3 times [2019-10-14 21:46:08,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815004093] [2019-10-14 21:46:08,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:08,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815004093] [2019-10-14 21:46:08,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44691559] [2019-10-14 21:46:08,178 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 21:46:08,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:08,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:08,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:46:08,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:08,388 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:08,389 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:08,391 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,393 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:08,393 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,393 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:46:08,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:08,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-10-14 21:46:08,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093292582] [2019-10-14 21:46:08,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:08,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:08,443 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2019-10-14 21:46:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,993 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2019-10-14 21:46:08,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:46:08,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-10-14 21:46:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,997 INFO L225 Difference]: With dead ends: 91 [2019-10-14 21:46:08,997 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:46:08,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:46:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2019-10-14 21:46:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:46:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-10-14 21:46:09,014 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 30 [2019-10-14 21:46:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,015 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-10-14 21:46:09,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-10-14 21:46:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:46:09,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,017 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,221 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash 515609862, now seen corresponding path program 1 times [2019-10-14 21:46:09,222 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965514922] [2019-10-14 21:46:09,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:46:09,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965514922] [2019-10-14 21:46:09,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:09,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:09,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877274945] [2019-10-14 21:46:09,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:09,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:09,313 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 4 states. [2019-10-14 21:46:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,367 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-10-14 21:46:09,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:09,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-10-14 21:46:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,370 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:46:09,370 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:46:09,371 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 21:46:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:46:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:46:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:46:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-14 21:46:09,379 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2019-10-14 21:46:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,380 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-14 21:46:09,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-14 21:46:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:46:09,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,381 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,382 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1119863012, now seen corresponding path program 1 times [2019-10-14 21:46:09,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096515882] [2019-10-14 21:46:09,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:46:09,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096515882] [2019-10-14 21:46:09,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752160451] [2019-10-14 21:46:09,524 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 21:46:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:46:09,605 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:09,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803880058] [2019-10-14 21:46:09,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:09,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:09,607 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2019-10-14 21:46:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,703 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2019-10-14 21:46:09,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:09,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-10-14 21:46:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,704 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:46:09,704 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:46:09,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 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 21:46:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:46:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-10-14 21:46:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:46:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 21:46:09,712 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2019-10-14 21:46:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,713 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 21:46:09,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 21:46:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:46:09,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,715 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,919 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash 875136345, now seen corresponding path program 2 times [2019-10-14 21:46:09,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825333879] [2019-10-14 21:46:09,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:46:10,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825333879] [2019-10-14 21:46:10,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695022590] [2019-10-14 21:46:10,043 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 21:46:10,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:10,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:10,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:46:10,141 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:10,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:10,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342771669] [2019-10-14 21:46:10,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:10,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:10,143 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 10 states. [2019-10-14 21:46:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:10,283 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2019-10-14 21:46:10,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:10,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2019-10-14 21:46:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:10,285 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:46:10,286 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:46:10,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 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 21:46:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:46:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-10-14 21:46:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:46:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-14 21:46:10,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2019-10-14 21:46:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:10,295 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-14 21:46:10,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-14 21:46:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:46:10,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:10,296 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:10,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,507 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1037062664, now seen corresponding path program 3 times [2019-10-14 21:46:10,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:10,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755016358] [2019-10-14 21:46:10,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:46:10,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755016358] [2019-10-14 21:46:10,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457696484] [2019-10-14 21:46:10,648 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 21:46:10,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:46:10,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:10,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,919 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:10,920 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:10,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,923 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:10,923 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,923 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-14 21:46:10,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:10,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-10-14 21:46:10,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343643910] [2019-10-14 21:46:10,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:46:10,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:46:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:10,984 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2019-10-14 21:46:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:11,722 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2019-10-14 21:46:11,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:46:11,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2019-10-14 21:46:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:11,723 INFO L225 Difference]: With dead ends: 111 [2019-10-14 21:46:11,723 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:46:11,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:46:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:46:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2019-10-14 21:46:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:46:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-10-14 21:46:11,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 53 [2019-10-14 21:46:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:11,733 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-10-14 21:46:11,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:46:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-10-14 21:46:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:46:11,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:11,734 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:11,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,940 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1707343249, now seen corresponding path program 4 times [2019-10-14 21:46:11,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:11,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047748679] [2019-10-14 21:46:11,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:46:12,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047748679] [2019-10-14 21:46:12,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001934101] [2019-10-14 21:46:12,119 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 21:46:12,194 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:12,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:12,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:12,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-14 21:46:12,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:12,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:12,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511713271] [2019-10-14 21:46:12,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:12,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:12,219 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2019-10-14 21:46:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:12,370 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2019-10-14 21:46:12,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:12,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2019-10-14 21:46:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:12,372 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:46:12,372 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 21:46:12,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 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 21:46:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 21:46:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-10-14 21:46:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:46:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-14 21:46:12,382 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2019-10-14 21:46:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:12,382 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-14 21:46:12,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-14 21:46:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:46:12,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:12,384 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:12,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,589 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 130026728, now seen corresponding path program 5 times [2019-10-14 21:46:12,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:12,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795736259] [2019-10-14 21:46:12,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-14 21:46:12,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795736259] [2019-10-14 21:46:12,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051416474] [2019-10-14 21:46:12,726 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 21:46:13,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-14 21:46:13,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:13,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:13,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:46:13,288 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:13,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:13,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341476083] [2019-10-14 21:46:13,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:13,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:13,290 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 13 states. [2019-10-14 21:46:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,495 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2019-10-14 21:46:13,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:13,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-14 21:46:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,497 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:46:13,497 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:46:13,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 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 21:46:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:46:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-10-14 21:46:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:46:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-10-14 21:46:13,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 71 [2019-10-14 21:46:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,508 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-10-14 21:46:13,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-10-14 21:46:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:46:13,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,509 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:13,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,714 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 556989109, now seen corresponding path program 6 times [2019-10-14 21:46:13,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:13,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457734418] [2019-10-14 21:46:13,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 21:46:13,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457734418] [2019-10-14 21:46:13,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818473606] [2019-10-14 21:46:13,857 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 21:46:14,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-10-14 21:46:14,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:14,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:46:14,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:14,476 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:14,477 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:14,478 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:14,482 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:14,482 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:14,482 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-10-14 21:46:14,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:14,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-10-14 21:46:14,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315067058] [2019-10-14 21:46:14,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:46:14,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:46:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:14,574 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 25 states. [2019-10-14 21:46:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:15,492 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2019-10-14 21:46:15,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:46:15,493 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 76 [2019-10-14 21:46:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:15,494 INFO L225 Difference]: With dead ends: 151 [2019-10-14 21:46:15,494 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:46:15,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=1763, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:46:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:46:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2019-10-14 21:46:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 21:46:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-10-14 21:46:15,520 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 76 [2019-10-14 21:46:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:15,520 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-10-14 21:46:15,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:46:15,520 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-10-14 21:46:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:46:15,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:15,527 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:15,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:15,728 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1762177064, now seen corresponding path program 7 times [2019-10-14 21:46:15,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:15,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940623857] [2019-10-14 21:46:15,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-10-14 21:46:15,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940623857] [2019-10-14 21:46:15,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703402339] [2019-10-14 21:46:15,889 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 21:46:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:15,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-10-14 21:46:15,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:15,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:15,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855202165] [2019-10-14 21:46:15,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:15,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:15,996 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 15 states. [2019-10-14 21:46:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:16,135 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2019-10-14 21:46:16,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:16,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-10-14 21:46:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:16,137 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:46:16,137 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 21:46:16,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 21:46:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2019-10-14 21:46:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:46:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-10-14 21:46:16,150 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2019-10-14 21:46:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:16,150 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-10-14 21:46:16,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-10-14 21:46:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 21:46:16,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:16,152 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:16,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:16,356 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1125903635, now seen corresponding path program 8 times [2019-10-14 21:46:16,358 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:16,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903322702] [2019-10-14 21:46:16,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:16,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:16,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-10-14 21:46:16,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903322702] [2019-10-14 21:46:16,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115685704] [2019-10-14 21:46:16,524 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 21:46:16,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:16,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:16,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:16,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-10-14 21:46:16,642 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:16,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:16,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512837662] [2019-10-14 21:46:16,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:16,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:16,644 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 16 states. [2019-10-14 21:46:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:16,831 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2019-10-14 21:46:16,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:16,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2019-10-14 21:46:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:16,833 INFO L225 Difference]: With dead ends: 173 [2019-10-14 21:46:16,833 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:46:16,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:46:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-10-14 21:46:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:46:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2019-10-14 21:46:16,843 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 94 [2019-10-14 21:46:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:16,845 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2019-10-14 21:46:16,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2019-10-14 21:46:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:46:16,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:16,847 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:17,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:17,051 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1552689484, now seen corresponding path program 9 times [2019-10-14 21:46:17,051 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:17,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824092917] [2019-10-14 21:46:17,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-10-14 21:46:17,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824092917] [2019-10-14 21:46:17,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359174003] [2019-10-14 21:46:17,244 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 21:46:17,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:46:17,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:17,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 21:46:17,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:17,811 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:17,811 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:17,812 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:17,816 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:17,817 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:17,817 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 128 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-14 21:46:17,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:17,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-10-14 21:46:17,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696523861] [2019-10-14 21:46:17,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:46:17,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:17,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:46:17,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:46:17,915 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 30 states. [2019-10-14 21:46:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:19,339 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2019-10-14 21:46:19,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:46:19,339 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 99 [2019-10-14 21:46:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:19,340 INFO L225 Difference]: With dead ends: 191 [2019-10-14 21:46:19,341 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:46:19,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=587, Invalid=2605, Unknown=0, NotChecked=0, Total=3192 [2019-10-14 21:46:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:46:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2019-10-14 21:46:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 21:46:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-10-14 21:46:19,350 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 99 [2019-10-14 21:46:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:19,351 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-10-14 21:46:19,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:46:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-10-14 21:46:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:46:19,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:19,352 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:19,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:19,558 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298587, now seen corresponding path program 10 times [2019-10-14 21:46:19,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:19,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580003937] [2019-10-14 21:46:19,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:19,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:19,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-14 21:46:19,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580003937] [2019-10-14 21:46:19,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499852762] [2019-10-14 21:46:19,747 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 21:46:19,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:19,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:19,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:46:19,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2019-10-14 21:46:19,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:19,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:46:19,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336144696] [2019-10-14 21:46:19,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:19,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:19,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:19,878 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 18 states. [2019-10-14 21:46:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:20,024 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2019-10-14 21:46:20,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:20,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2019-10-14 21:46:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:20,025 INFO L225 Difference]: With dead ends: 205 [2019-10-14 21:46:20,026 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 21:46:20,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 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 21:46:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 21:46:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-10-14 21:46:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 21:46:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-10-14 21:46:20,036 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 112 [2019-10-14 21:46:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:20,036 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-10-14 21:46:20,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-10-14 21:46:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 21:46:20,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:20,038 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:20,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:20,243 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1682959964, now seen corresponding path program 11 times [2019-10-14 21:46:20,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:20,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258765758] [2019-10-14 21:46:20,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:20,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:20,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 8 proven. 196 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-14 21:46:20,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258765758] [2019-10-14 21:46:20,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125936329] [2019-10-14 21:46:20,447 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 21:46:25,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:46:25,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:25,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:46:25,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-14 21:46:25,791 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:25,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:46:25,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134023329] [2019-10-14 21:46:25,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:25,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:25,793 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 19 states. [2019-10-14 21:46:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:25,966 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2019-10-14 21:46:25,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:25,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2019-10-14 21:46:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:25,968 INFO L225 Difference]: With dead ends: 213 [2019-10-14 21:46:25,968 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 21:46:25,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 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 21:46:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 21:46:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2019-10-14 21:46:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:46:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2019-10-14 21:46:25,977 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2019-10-14 21:46:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:25,977 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2019-10-14 21:46:25,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2019-10-14 21:46:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 21:46:25,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:25,979 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:26,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,188 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash -876870583, now seen corresponding path program 12 times [2019-10-14 21:46:26,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:26,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074439675] [2019-10-14 21:46:26,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 8 proven. 330 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-10-14 21:46:26,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074439675] [2019-10-14 21:46:26,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498537392] [2019-10-14 21:46:26,401 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 21:46:27,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-10-14 21:46:27,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:27,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 21:46:27,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:27,417 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:27,417 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:27,418 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,429 INFO L567 ElimStorePlain]: treesize reduction 9, result has 25.0 percent of original size [2019-10-14 21:46:27,430 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:27,430 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 8 proven. 207 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2019-10-14 21:46:27,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:27,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-10-14 21:46:27,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920999793] [2019-10-14 21:46:27,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:46:27,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:46:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:46:27,572 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 35 states. [2019-10-14 21:46:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:29,452 INFO L93 Difference]: Finished difference Result 231 states and 237 transitions. [2019-10-14 21:46:29,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:46:29,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2019-10-14 21:46:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:29,454 INFO L225 Difference]: With dead ends: 231 [2019-10-14 21:46:29,454 INFO L226 Difference]: Without dead ends: 143 [2019-10-14 21:46:29,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=813, Invalid=3609, Unknown=0, NotChecked=0, Total=4422 [2019-10-14 21:46:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-14 21:46:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2019-10-14 21:46:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-14 21:46:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2019-10-14 21:46:29,463 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 122 [2019-10-14 21:46:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:29,464 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2019-10-14 21:46:29,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:46:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2019-10-14 21:46:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 21:46:29,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:29,465 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:29,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:29,672 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -33787756, now seen corresponding path program 13 times [2019-10-14 21:46:29,673 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:29,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923155141] [2019-10-14 21:46:29,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:29,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:29,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2019-10-14 21:46:29,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923155141] [2019-10-14 21:46:29,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211988181] [2019-10-14 21:46:29,908 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 21:46:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:30,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-10-14 21:46:30,034 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:30,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:46:30,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110573980] [2019-10-14 21:46:30,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:46:30,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:46:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:30,035 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 21 states. [2019-10-14 21:46:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:30,245 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2019-10-14 21:46:30,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:46:30,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2019-10-14 21:46:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:30,247 INFO L225 Difference]: With dead ends: 245 [2019-10-14 21:46:30,247 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:46:30,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:46:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-10-14 21:46:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 21:46:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2019-10-14 21:46:30,256 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2019-10-14 21:46:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:30,257 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2019-10-14 21:46:30,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:46:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2019-10-14 21:46:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 21:46:30,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:30,258 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:30,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:30,466 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 578687105, now seen corresponding path program 14 times [2019-10-14 21:46:30,467 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:30,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319710280] [2019-10-14 21:46:30,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-14 21:46:30,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319710280] [2019-10-14 21:46:30,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790239017] [2019-10-14 21:46:30,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:46:30,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:30,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:30,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:46:30,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-14 21:46:30,914 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:30,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:46:30,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431301200] [2019-10-14 21:46:30,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:30,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:30,916 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 22 states. [2019-10-14 21:46:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:31,173 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2019-10-14 21:46:31,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:46:31,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 140 [2019-10-14 21:46:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:31,176 INFO L225 Difference]: With dead ends: 253 [2019-10-14 21:46:31,176 INFO L226 Difference]: Without dead ends: 151 [2019-10-14 21:46:31,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-14 21:46:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-10-14 21:46:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 21:46:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2019-10-14 21:46:31,189 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 140 [2019-10-14 21:46:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:31,190 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2019-10-14 21:46:31,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:46:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2019-10-14 21:46:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 21:46:31,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:31,192 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:31,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:31,399 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:31,399 INFO L82 PathProgramCache]: Analyzing trace with hash -529674384, now seen corresponding path program 15 times [2019-10-14 21:46:31,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:31,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788687935] [2019-10-14 21:46:31,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 10 proven. 477 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2019-10-14 21:46:31,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788687935] [2019-10-14 21:46:31,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276754649] [2019-10-14 21:46:31,888 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 21:46:33,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 21:46:33,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:33,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 21:46:33,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:33,996 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:33,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 21:46:33,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,002 INFO L567 ElimStorePlain]: treesize reduction 9, result has 25.0 percent of original size [2019-10-14 21:46:34,002 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,003 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-10-14 21:46:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 10 proven. 305 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2019-10-14 21:46:34,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:34,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2019-10-14 21:46:34,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821811883] [2019-10-14 21:46:34,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:46:34,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:46:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:46:34,155 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 40 states. [2019-10-14 21:46:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:36,329 INFO L93 Difference]: Finished difference Result 271 states and 277 transitions. [2019-10-14 21:46:36,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-14 21:46:36,329 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 145 [2019-10-14 21:46:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:36,331 INFO L225 Difference]: With dead ends: 271 [2019-10-14 21:46:36,331 INFO L226 Difference]: Without dead ends: 166 [2019-10-14 21:46:36,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1077, Invalid=4775, Unknown=0, NotChecked=0, Total=5852 [2019-10-14 21:46:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-10-14 21:46:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2019-10-14 21:46:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-14 21:46:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2019-10-14 21:46:36,342 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 145 [2019-10-14 21:46:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:36,342 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2019-10-14 21:46:36,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:46:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2019-10-14 21:46:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:46:36,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:36,344 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:36,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:36,550 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1725935801, now seen corresponding path program 16 times [2019-10-14 21:46:36,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:36,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558579549] [2019-10-14 21:46:36,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:36,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:36,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 12 proven. 361 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2019-10-14 21:46:36,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558579549] [2019-10-14 21:46:36,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700071981] [2019-10-14 21:46:36,851 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 21:46:37,001 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:37,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:37,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:46:37,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-10-14 21:46:37,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:37,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:46:37,053 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062885758] [2019-10-14 21:46:37,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:46:37,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:46:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:46:37,055 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 24 states. [2019-10-14 21:46:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:37,319 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2019-10-14 21:46:37,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:46:37,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 158 [2019-10-14 21:46:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:37,324 INFO L225 Difference]: With dead ends: 285 [2019-10-14 21:46:37,324 INFO L226 Difference]: Without dead ends: 169 [2019-10-14 21:46:37,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 171 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 21:46:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-14 21:46:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2019-10-14 21:46:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-14 21:46:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2019-10-14 21:46:37,334 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 158 [2019-10-14 21:46:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:37,335 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2019-10-14 21:46:37,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:46:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2019-10-14 21:46:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 21:46:37,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:37,336 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:37,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:37,540 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1783781792, now seen corresponding path program 17 times [2019-10-14 21:46:37,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:37,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776115775] [2019-10-14 21:46:37,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:37,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:37,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 12 proven. 400 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2019-10-14 21:46:37,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776115775] [2019-10-14 21:46:37,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534303751] [2019-10-14 21:46:37,952 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