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-crafted/bAnd1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:11,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:11,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:12,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:12,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:12,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:12,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:12,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:12,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:12,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:12,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:12,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:12,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:12,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:12,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:12,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:12,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:12,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:12,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:12,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:12,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:12,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:12,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:12,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:12,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:40:12,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:12,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:12,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:12,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:12,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:12,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:12,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:12,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:12,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:12,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:12,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:12,045 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 21:40:12,060 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:12,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:12,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:12,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:12,062 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:12,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:12,062 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:12,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:12,064 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:12,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:12,064 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:12,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:12,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:12,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:12,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:12,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:12,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:12,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:12,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:12,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:12,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:12,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:12,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:12,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:12,364 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:12,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:12,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:12,383 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:12,383 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:12,384 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2019-10-14 21:40:12,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea5086a4/680eab24356c41a9b0a4ee523b6f8424/FLAG5f441eb70 [2019-10-14 21:40:12,957 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:12,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i [2019-10-14 21:40:12,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea5086a4/680eab24356c41a9b0a4ee523b6f8424/FLAG5f441eb70 [2019-10-14 21:40:13,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea5086a4/680eab24356c41a9b0a4ee523b6f8424 [2019-10-14 21:40:13,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:13,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:13,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:13,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:13,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:13,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661c4446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13, skipping insertion in model container [2019-10-14 21:40:13,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,312 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:13,329 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:13,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:13,520 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:13,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:13,553 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:13,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13 WrapperNode [2019-10-14 21:40:13,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:13,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:13,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:13,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:13,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:13,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:13,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:13,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:13,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (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 21:40:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-14 21:40:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:14,060 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:14,061 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:14,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14 BoogieIcfgContainer [2019-10-14 21:40:14,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:40:14,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:40:14,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:40:14,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:40:14,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:13" (1/3) ... [2019-10-14 21:40:14,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790b5f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (2/3) ... [2019-10-14 21:40:14,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790b5f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14" (3/3) ... [2019-10-14 21:40:14,071 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2019-10-14 21:40:14,082 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:40:14,090 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:40:14,104 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:40:14,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:40:14,151 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:40:14,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:40:14,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:40:14,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:40:14,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:40:14,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:40:14,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:40:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:40:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:14,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:14,178 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:14,180 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-14 21:40:14,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:14,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546759220] [2019-10-14 21:40:14,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:14,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546759220] [2019-10-14 21:40:14,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:40:14,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:40:14,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430512794] [2019-10-14 21:40:14,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:14,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:14,442 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:40:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:14,561 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 21:40:14,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:14,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:14,577 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:40:14,577 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:40:14,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:40:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:40:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:40:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:40:14,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 21:40:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:14,638 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:40:14,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:40:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:14,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:14,642 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:14,642 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-14 21:40:14,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:14,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916418160] [2019-10-14 21:40:14,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:40:14,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916418160] [2019-10-14 21:40:14,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557150820] [2019-10-14 21:40:14,837 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 21:40:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:14,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:14,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:14,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:40:14,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725666884] [2019-10-14 21:40:14,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:14,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:14,992 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 21:40:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,008 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:40:15,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,010 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:15,010 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:40:15,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:40:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:40:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:40:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:40:15,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 21:40:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,020 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:40:15,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:40:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:40:15,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,022 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:15,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,227 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-14 21:40:15,229 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962163632] [2019-10-14 21:40:15,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:40:15,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962163632] [2019-10-14 21:40:15,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366572315] [2019-10-14 21:40:15,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:15,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:40:15,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:15,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 21:40:15,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760260994] [2019-10-14 21:40:15,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:15,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:40:15,459 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 21:40:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,476 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:40:15,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 21:40:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,478 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:15,478 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:40:15,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:40:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:40:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:40:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:40:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:40:15,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 21:40:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,487 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:40:15,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:40:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:40:15,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,489 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:15,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,700 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-14 21:40:15,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575192803] [2019-10-14 21:40:15,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:15,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575192803] [2019-10-14 21:40:15,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26389714] [2019-10-14 21:40:15,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:15,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:40:15,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:15,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:40:15,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790846208] [2019-10-14 21:40:15,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:15,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:15,907 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:40:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,919 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 21:40:15,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 21:40:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,921 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:40:15,921 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:40:15,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:40:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:40:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:40:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:40:15,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 21:40:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,930 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:40:15,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:40:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:40:15,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,931 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:16,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,136 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-14 21:40:16,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430796285] [2019-10-14 21:40:16,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:16,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430796285] [2019-10-14 21:40:16,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452453747] [2019-10-14 21:40:16,264 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 21:40:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:40:16,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:16,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 21:40:16,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217161801] [2019-10-14 21:40:16,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:40:16,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:40:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:40:16,358 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:40:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:16,514 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:40:16,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:40:16,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 21:40:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:16,518 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:40:16,518 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:40:16,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:40:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:40:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 21:40:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:40:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:40:16,533 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 21:40:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:16,537 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:40:16,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:40:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:40:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:40:16,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:16,541 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:16,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,742 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-14 21:40:16,743 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650822685] [2019-10-14 21:40:16,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:16,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650822685] [2019-10-14 21:40:16,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014408335] [2019-10-14 21:40:16,852 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:40:16,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:16,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:16,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:16,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:16,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:40:16,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208726944] [2019-10-14 21:40:16,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:40:16,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:40:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:16,958 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 21:40:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,052 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:40:17,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:40:17,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 21:40:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,053 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:40:17,054 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:40:17,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:40:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:40:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:40:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:40:17,061 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 21:40:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,062 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:40:17,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:40:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:40:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:40:17,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,063 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:17,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,267 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-14 21:40:17,268 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083111666] [2019-10-14 21:40:17,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:17,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083111666] [2019-10-14 21:40:17,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672887821] [2019-10-14 21:40:17,394 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 21:40:17,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:40:17,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:17,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:17,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:40:17,503 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:17,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:40:17,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970117135] [2019-10-14 21:40:17,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:17,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:17,505 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 21:40:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,620 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:40:17,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:40:17,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 21:40:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,621 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:40:17,621 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:40:17,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:40:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:40:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:40:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 21:40:17,628 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 21:40:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,629 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 21:40:17,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 21:40:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:40:17,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,630 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:17,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,836 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-14 21:40:17,836 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406402768] [2019-10-14 21:40:17,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:17,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406402768] [2019-10-14 21:40:17,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541203622] [2019-10-14 21:40:17,952 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 21:40:18,024 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:18,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,062 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:40:18,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116857485] [2019-10-14 21:40:18,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:18,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:18,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,067 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 21:40:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,187 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 21:40:18,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:40:18,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 21:40:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,189 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:40:18,189 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:40:18,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:40:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:40:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:40:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:40:18,204 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 21:40:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,204 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:40:18,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:40:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:40:18,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,207 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:18,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:18,409 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-14 21:40:18,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:18,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689331076] [2019-10-14 21:40:18,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689331076] [2019-10-14 21:40:18,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25633703] [2019-10-14 21:40:18,522 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 21:40:18,586 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:40:18,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:40:18,634 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:40:18,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412733673] [2019-10-14 21:40:18,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:18,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:18,636 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 21:40:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,798 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:40:18,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:18,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:40:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,800 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:40:18,800 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:40:18,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:40:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:40:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:40:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:40:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:40:18,807 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 21:40:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,807 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:40:18,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:40:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:40:18,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,809 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:19,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,020 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-14 21:40:19,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556446389] [2019-10-14 21:40:19,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:40:19,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556446389] [2019-10-14 21:40:19,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795815742] [2019-10-14 21:40:19,135 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 21:40:19,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:40:19,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:19,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:40:19,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:19,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:40:19,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299535950] [2019-10-14 21:40:19,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:40:19,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:19,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:40:19,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:40:19,270 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:40:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:19,466 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 21:40:19,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:40:19,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:40:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:19,468 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:40:19,468 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:40:19,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:40:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 21:40:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:40:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:40:19,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 21:40:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:19,476 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:40:19,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:40:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:40:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:40:19,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:19,477 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:19,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,683 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-14 21:40:19,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219721437] [2019-10-14 21:40:19,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:19,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219721437] [2019-10-14 21:40:19,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846009954] [2019-10-14 21:40:19,874 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 21:40:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:19,966 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:19,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:40:19,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633603681] [2019-10-14 21:40:19,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:19,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:19,968 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 21:40:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,056 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:40:20,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:40:20,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:40:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,057 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:40:20,057 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:40:20,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:40:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:40:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:40:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:40:20,063 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 21:40:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,064 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:40:20,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:40:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:40:20,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,065 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:20,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,275 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-14 21:40:20,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:20,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575227047] [2019-10-14 21:40:20,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575227047] [2019-10-14 21:40:20,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046610355] [2019-10-14 21:40:20,397 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 21:40:20,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:20,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:20,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:20,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,484 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:20,484 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:40:20,484 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603337125] [2019-10-14 21:40:20,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:40:20,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:40:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:40:20,486 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 21:40:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,588 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 21:40:20,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:20,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 21:40:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,589 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:40:20,590 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:40:20,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:40:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:40:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:40:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:40:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 21:40:20,597 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 21:40:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,597 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 21:40:20,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:40:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 21:40:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:40:20,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,598 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:20,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,803 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-14 21:40:20,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:20,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185408595] [2019-10-14 21:40:20,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185408595] [2019-10-14 21:40:20,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760396396] [2019-10-14 21:40:20,933 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 21:40:20,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:40:20,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:20,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:21,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:40:21,085 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:40:21,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880258501] [2019-10-14 21:40:21,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:40:21,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:40:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:40:21,090 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 21:40:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:21,318 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 21:40:21,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:40:21,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:40:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:21,319 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:40:21,319 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:40:21,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:40:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:40:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:40:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:40:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 21:40:21,336 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 21:40:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:21,337 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 21:40:21,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:40:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 21:40:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:40:21,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:21,344 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:21,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:21,550 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-14 21:40:21,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:21,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608044337] [2019-10-14 21:40:21,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:40:21,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608044337] [2019-10-14 21:40:21,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641146521] [2019-10-14 21:40:21,743 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 21:40:21,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:21,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:21,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:21,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:40:21,901 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,901 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:40:21,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640255157] [2019-10-14 21:40:21,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:21,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:21,903 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 21:40:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:22,155 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 21:40:22,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:40:22,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 21:40:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:22,157 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:40:22,157 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:40:22,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:40:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 21:40:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:40:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:40:22,165 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 21:40:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:22,167 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:40:22,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:40:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:40:22,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:22,168 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:22,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:22,369 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-14 21:40:22,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:22,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057069933] [2019-10-14 21:40:22,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 21:40:22,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057069933] [2019-10-14 21:40:22,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685410275] [2019-10-14 21:40:22,533 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 21:40:22,799 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:40:22,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:22,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:40:22,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:40:22,909 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:22,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:40:22,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355617603] [2019-10-14 21:40:22,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:22,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:22,912 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 21:40:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:23,149 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 21:40:23,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:40:23,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 21:40:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:23,151 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:40:23,151 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:40:23,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:40:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 21:40:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:40:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:40:23,158 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 21:40:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:23,158 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:40:23,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:40:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:40:23,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:23,159 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:23,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:23,372 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-14 21:40:23,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:23,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010436752] [2019-10-14 21:40:23,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 21:40:23,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010436752] [2019-10-14 21:40:23,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662495767] [2019-10-14 21:40:23,551 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 21:40:23,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:40:23,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:23,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:23,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 21:40:23,709 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:23,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:40:23,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439432973] [2019-10-14 21:40:23,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:40:23,711 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:40:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:23,712 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 21:40:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:23,900 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 21:40:23,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:23,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:40:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:23,902 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:40:23,903 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:40:23,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:40:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:40:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:40:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 21:40:23,909 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 21:40:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:23,910 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 21:40:23,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:40:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 21:40:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:40:23,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:23,911 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:24,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:24,118 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-14 21:40:24,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:24,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028787280] [2019-10-14 21:40:24,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:24,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028787280] [2019-10-14 21:40:24,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561389600] [2019-10-14 21:40:24,289 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 21:40:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:40:24,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:24,394 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:24,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:40:24,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674237417] [2019-10-14 21:40:24,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:40:24,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:40:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:24,395 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 21:40:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:24,518 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 21:40:24,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:40:24,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 21:40:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:24,520 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:40:24,520 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:40:24,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:40:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:40:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:40:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 21:40:24,526 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 21:40:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:24,526 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 21:40:24,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:40:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 21:40:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:40:24,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:24,528 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:24,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:24,738 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-14 21:40:24,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:24,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871513746] [2019-10-14 21:40:24,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:24,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871513746] [2019-10-14 21:40:24,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354329651] [2019-10-14 21:40:24,998 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 21:40:25,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:25,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:25,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:40:25,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:25,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:40:25,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131760159] [2019-10-14 21:40:25,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:25,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:25,119 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 21:40:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:25,234 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 21:40:25,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:40:25,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 21:40:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:25,235 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:40:25,235 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:40:25,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:40:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:40:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:40:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:40:25,241 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 21:40:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:25,242 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:40:25,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:40:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:40:25,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:25,243 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,447 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-14 21:40:25,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:25,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285576846] [2019-10-14 21:40:25,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285576846] [2019-10-14 21:40:25,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135696112] [2019-10-14 21:40:25,667 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 21:40:25,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:40:25,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:25,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:25,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 21:40:25,841 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:25,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:40:25,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145155339] [2019-10-14 21:40:25,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:25,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:25,844 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 21:40:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:26,036 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 21:40:26,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:26,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 21:40:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:26,038 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:40:26,038 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:40:26,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:40:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:40:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:40:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 21:40:26,044 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 21:40:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:26,044 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 21:40:26,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 21:40:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:40:26,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:26,046 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:26,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,251 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:26,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-14 21:40:26,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:26,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174623243] [2019-10-14 21:40:26,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:26,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174623243] [2019-10-14 21:40:26,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198786039] [2019-10-14 21:40:26,502 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 21:40:26,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:26,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:26,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:40:26,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:26,601 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:26,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:40:26,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418061143] [2019-10-14 21:40:26,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:26,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:26,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:26,603 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 21:40:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:26,748 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:40:26,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:26,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 21:40:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:26,750 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:40:26,750 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:40:26,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 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 21:40:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:40:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:40:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:40:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 21:40:26,755 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 21:40:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:26,755 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 21:40:26,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 21:40:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:40:26,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:26,757 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:26,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,966 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-14 21:40:26,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:26,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723984125] [2019-10-14 21:40:26,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:27,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723984125] [2019-10-14 21:40:27,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143540414] [2019-10-14 21:40:27,212 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:28,381 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:40:28,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:28,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:28,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 21:40:28,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:28,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 21:40:28,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384360902] [2019-10-14 21:40:28,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:28,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:28,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:28,498 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 21:40:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:28,831 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 21:40:28,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:28,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 21:40:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:28,833 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:40:28,833 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:40:28,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:40:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 21:40:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:40:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 21:40:28,840 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 21:40:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:28,840 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 21:40:28,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 21:40:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:40:28,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:28,842 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:29,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:29,047 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-14 21:40:29,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:29,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968176344] [2019-10-14 21:40:29,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:29,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:29,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 21:40:29,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968176344] [2019-10-14 21:40:29,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723458587] [2019-10-14 21:40:29,313 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:29,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:40:29,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:29,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:40:29,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 21:40:29,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:29,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 21:40:29,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741731541] [2019-10-14 21:40:29,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:29,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:29,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:29,944 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 21:40:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:30,187 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 21:40:30,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:30,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 21:40:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:30,189 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:40:30,189 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:40:30,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:40:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 21:40:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:40:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 21:40:30,194 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 21:40:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:30,195 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 21:40:30,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 21:40:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:40:30,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:30,197 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:30,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:30,398 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-10-14 21:40:30,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:30,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977275464] [2019-10-14 21:40:30,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:30,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977275464] [2019-10-14 21:40:30,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420033398] [2019-10-14 21:40:30,685 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:40:30,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:30,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:30,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:40:30,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943781930] [2019-10-14 21:40:30,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:30,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:30,807 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 21:40:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:30,975 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-14 21:40:30,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:40:30,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 21:40:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:30,980 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:40:30,980 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:40:30,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:40:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:40:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:40:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 21:40:30,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 21:40:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:30,988 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 21:40:30,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 21:40:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:40:30,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:30,989 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:31,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:31,193 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-10-14 21:40:31,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:31,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605756396] [2019-10-14 21:40:31,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:31,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605756396] [2019-10-14 21:40:31,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995647] [2019-10-14 21:40:31,591 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:31,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:31,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:31,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:40:31,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:31,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:31,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:40:31,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803714793] [2019-10-14 21:40:31,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:40:31,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:40:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:31,750 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-14 21:40:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:31,958 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:40:31,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:31,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:40:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:31,959 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:40:31,960 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:40:31,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:40:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:40:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:40:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 21:40:31,965 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 21:40:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:31,965 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 21:40:31,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:40:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 21:40:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:40:31,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:31,967 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:32,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:32,168 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-10-14 21:40:32,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:32,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486860272] [2019-10-14 21:40:32,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:32,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486860272] [2019-10-14 21:40:32,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801661402] [2019-10-14 21:40:32,458 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:32,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:40:32,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:32,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:32,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 21:40:32,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:32,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 21:40:32,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477623888] [2019-10-14 21:40:32,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:40:32,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:40:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:32,733 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-14 21:40:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:33,046 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-14 21:40:33,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:40:33,046 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-14 21:40:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:33,047 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:40:33,047 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:40:33,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:40:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:40:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:40:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-14 21:40:33,053 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-14 21:40:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:33,053 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-14 21:40:33,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:40:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-14 21:40:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 21:40:33,055 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:33,055 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:33,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:33,259 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-10-14 21:40:33,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:33,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659230935] [2019-10-14 21:40:33,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:33,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659230935] [2019-10-14 21:40:33,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593512958] [2019-10-14 21:40:33,591 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:33,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:33,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:33,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:40:33,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:33,759 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:33,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:40:33,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50323179] [2019-10-14 21:40:33,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:40:33,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:40:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:33,762 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-14 21:40:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:34,073 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-14 21:40:34,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:40:34,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-14 21:40:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:34,075 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:40:34,075 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:40:34,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:40:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:40:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:40:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 21:40:34,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-14 21:40:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:34,083 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 21:40:34,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:40:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 21:40:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:40:34,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:34,086 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:34,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:34,292 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-10-14 21:40:34,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:34,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67777348] [2019-10-14 21:40:34,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:34,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67777348] [2019-10-14 21:40:34,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422261243] [2019-10-14 21:40:34,695 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:36,972 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 21:40:36,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:36,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:36,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-14 21:40:37,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:37,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-14 21:40:37,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127325643] [2019-10-14 21:40:37,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:40:37,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:40:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:37,119 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-14 21:40:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:37,578 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-14 21:40:37,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:40:37,578 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-14 21:40:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:37,579 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:40:37,580 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:40:37,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:40:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:40:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-14 21:40:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:40:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-14 21:40:37,586 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-14 21:40:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:37,586 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-14 21:40:37,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:40:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-14 21:40:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:40:37,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:37,588 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:37,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:37,794 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-10-14 21:40:37,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:37,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078445012] [2019-10-14 21:40:37,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:37,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:37,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-14 21:40:38,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078445012] [2019-10-14 21:40:38,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061835786] [2019-10-14 21:40:38,166 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:39,227 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:40:39,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:39,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:40:39,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-14 21:40:39,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:39,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-14 21:40:39,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148655396] [2019-10-14 21:40:39,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:40:39,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:40:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:39,366 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-14 21:40:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:39,661 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-14 21:40:39,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:40:39,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-14 21:40:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:39,663 INFO L225 Difference]: With dead ends: 153 [2019-10-14 21:40:39,663 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:40:39,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:40:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 21:40:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:40:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 21:40:39,670 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-14 21:40:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:39,670 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 21:40:39,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:40:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 21:40:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:40:39,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:39,671 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:39,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:39,876 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-10-14 21:40:39,877 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:39,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762201675] [2019-10-14 21:40:39,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:39,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:39,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:40,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762201675] [2019-10-14 21:40:40,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620869899] [2019-10-14 21:40:40,733 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:40:40,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:40,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:40,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:40:40,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379192408] [2019-10-14 21:40:40,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:40:40,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:40:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:40,885 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-14 21:40:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:41,138 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-14 21:40:41,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:40:41,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-14 21:40:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:41,139 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:40:41,140 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:40:41,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:40:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 21:40:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:40:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 21:40:41,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-14 21:40:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:41,149 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 21:40:41,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:40:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 21:40:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:40:41,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:41,151 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:41,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:41,356 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-10-14 21:40:41,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:41,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776076336] [2019-10-14 21:40:41,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:41,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:41,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:41,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776076336] [2019-10-14 21:40:41,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600596095] [2019-10-14 21:40:41,883 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:41,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:41,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:41,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:40:41,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:42,035 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:42,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:40:42,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605732395] [2019-10-14 21:40:42,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:40:42,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:40:42,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:42,038 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-14 21:40:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:42,218 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-14 21:40:42,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:40:42,219 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-14 21:40:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:42,220 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:40:42,220 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:40:42,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:40:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:40:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:40:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 21:40:42,229 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-14 21:40:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:42,229 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 21:40:42,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:40:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 21:40:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:40:42,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:42,231 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:42,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:42,435 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:42,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-10-14 21:40:42,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:42,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282442866] [2019-10-14 21:40:42,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:42,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:42,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:42,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282442866] [2019-10-14 21:40:42,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210684760] [2019-10-14 21:40:42,906 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:43,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:40:43,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:43,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:43,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-14 21:40:43,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:43,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-14 21:40:43,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268586086] [2019-10-14 21:40:43,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:40:43,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:40:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:40:43,308 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-14 21:40:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:43,842 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-14 21:40:43,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:40:43,843 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-14 21:40:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:43,844 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:40:43,844 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:40:43,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:40:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:40:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 21:40:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:40:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 21:40:43,852 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-14 21:40:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:43,852 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 21:40:43,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:40:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 21:40:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:40:43,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:43,853 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:44,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:44,058 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-10-14 21:40:44,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:44,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458704984] [2019-10-14 21:40:44,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:44,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:44,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-14 21:40:44,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458704984] [2019-10-14 21:40:44,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502067432] [2019-10-14 21:40:44,474 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:44,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:44,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:44,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:40:44,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-14 21:40:44,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:44,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-14 21:40:44,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843597033] [2019-10-14 21:40:44,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:40:44,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:40:44,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:40:44,833 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-14 21:40:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:45,366 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-14 21:40:45,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:40:45,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-14 21:40:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:45,368 INFO L225 Difference]: With dead ends: 169 [2019-10-14 21:40:45,368 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 21:40:45,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:40:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 21:40:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-14 21:40:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:40:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-14 21:40:45,379 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-14 21:40:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:45,380 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-14 21:40:45,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:40:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-14 21:40:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:40:45,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:45,381 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:45,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:45,582 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-10-14 21:40:45,582 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:45,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455666075] [2019-10-14 21:40:45,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 21:40:46,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455666075] [2019-10-14 21:40:46,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2686064] [2019-10-14 21:40:46,143 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true