java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:21,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:21,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:21,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:21,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:21,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:21,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:21,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:21,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:21,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:21,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:21,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:21,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:21,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:21,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:21,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:21,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:21,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:21,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:21,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:21,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:21,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:21,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:21,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:21,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:21,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:21,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:21,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:21,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:21,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:21,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:21,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:21,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:21,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:21,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:21,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:21,713 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 21:43:21,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:21,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:21,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:21,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:21,735 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:21,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:21,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:21,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:21,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:21,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:21,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:21,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:21,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:21,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:21,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:21,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:21,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:21,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:21,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:21,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:21,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:21,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:21,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:21,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:21,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:21,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:21,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:21,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:21,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:22,007 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:22,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:22,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:22,024 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:22,024 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:22,025 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-10-14 21:43:22,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9887d956/49734afa28294b7b9937e687a153faf2/FLAG40b28843c [2019-10-14 21:43:22,560 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:22,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-10-14 21:43:22,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9887d956/49734afa28294b7b9937e687a153faf2/FLAG40b28843c [2019-10-14 21:43:22,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9887d956/49734afa28294b7b9937e687a153faf2 [2019-10-14 21:43:22,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:22,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:22,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:22,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:22,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:22,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:22" (1/1) ... [2019-10-14 21:43:22,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af509e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:22, skipping insertion in model container [2019-10-14 21:43:22,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:22" (1/1) ... [2019-10-14 21:43:22,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:22,987 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:23,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,206 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:23,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,379 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:23,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23 WrapperNode [2019-10-14 21:43:23,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:23,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:23,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:23,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:23,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:23,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:23,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (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 21:43:23,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:23,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:23,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:23,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:23,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:23,816 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:43:23,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:23 BoogieIcfgContainer [2019-10-14 21:43:23,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:23,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:23,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:23,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:23,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:22" (1/3) ... [2019-10-14 21:43:23,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dafb58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (2/3) ... [2019-10-14 21:43:23,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dafb58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:23" (3/3) ... [2019-10-14 21:43:23,829 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2019-10-14 21:43:23,846 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:23,863 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:23,886 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:23,910 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:23,911 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:23,911 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:23,911 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:23,911 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:23,911 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:23,912 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:23,912 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-14 21:43:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:23,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,940 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:23,941 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-10-14 21:43:23,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341386423] [2019-10-14 21:43:23,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:24,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341386423] [2019-10-14 21:43:24,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:24,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242090199] [2019-10-14 21:43:24,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:24,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:24,176 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-14 21:43:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,315 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-10-14 21:43:24,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:24,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-14 21:43:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,326 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:43:24,327 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:43:24,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:43:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:43:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:43:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:43:24,383 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-14 21:43:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,384 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:43:24,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:43:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:24,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,387 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,387 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-10-14 21:43:24,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430361332] [2019-10-14 21:43:24,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:24,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430361332] [2019-10-14 21:43:24,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:24,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127320239] [2019-10-14 21:43:24,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:24,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,495 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-10-14 21:43:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,586 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-10-14 21:43:24,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:24,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:43:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,588 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:43:24,588 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:43:24,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:43:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:43:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:43:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-14 21:43:24,597 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-10-14 21:43:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,597 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-14 21:43:24,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-14 21:43:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:24,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,598 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-10-14 21:43:24,599 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414246672] [2019-10-14 21:43:24,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:24,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414246672] [2019-10-14 21:43:24,708 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:24,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363753441] [2019-10-14 21:43:24,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:24,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,710 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-10-14 21:43:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,843 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-10-14 21:43:24,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:24,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:43:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,845 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:43:24,845 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:24,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-10-14 21:43:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:43:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 21:43:24,853 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-10-14 21:43:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,854 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 21:43:24,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 21:43:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:43:24,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,856 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,856 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-10-14 21:43:24,857 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731748229] [2019-10-14 21:43:24,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731748229] [2019-10-14 21:43:25,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803317556] [2019-10-14 21:43:25,005 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 21:43:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:25,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961300543] [2019-10-14 21:43:25,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:25,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,127 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2019-10-14 21:43:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,224 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-14 21:43:25,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:25,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-14 21:43:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,226 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:43:25,226 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:43:25,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:43:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-14 21:43:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:43:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-14 21:43:25,238 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-10-14 21:43:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,240 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-14 21:43:25,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-14 21:43:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:43:25,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,242 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-10-14 21:43:25,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652519987] [2019-10-14 21:43:25,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652519987] [2019-10-14 21:43:25,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318728821] [2019-10-14 21:43:25,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:25,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:25,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,599 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:25,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584841225] [2019-10-14 21:43:25,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:25,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:25,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:25,601 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-10-14 21:43:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,692 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2019-10-14 21:43:25,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:25,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-10-14 21:43:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,694 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:25,694 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:25,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 21:43:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:43:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-14 21:43:25,702 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2019-10-14 21:43:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,702 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-14 21:43:25,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-14 21:43:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:43:25,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,704 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash 246203558, now seen corresponding path program 3 times [2019-10-14 21:43:25,909 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915671625] [2019-10-14 21:43:25,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:26,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915671625] [2019-10-14 21:43:26,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265555659] [2019-10-14 21:43:26,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:43:26,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:43:26,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:43:26,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520843575] [2019-10-14 21:43:26,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:26,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:26,105 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2019-10-14 21:43:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:26,321 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-10-14 21:43:26,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:43:26,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-10-14 21:43:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:26,324 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:43:26,324 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:43:26,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 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 21:43:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:43:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-10-14 21:43:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:43:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-10-14 21:43:26,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 39 [2019-10-14 21:43:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:26,342 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-10-14 21:43:26,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-10-14 21:43:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:43:26,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,344 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:26,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,557 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 575548698, now seen corresponding path program 4 times [2019-10-14 21:43:26,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155695148] [2019-10-14 21:43:26,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:43:26,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155695148] [2019-10-14 21:43:26,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732879705] [2019-10-14 21:43:26,706 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:26,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:43:26,789 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:43:26,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377891056] [2019-10-14 21:43:26,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:26,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:26,792 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 9 states. [2019-10-14 21:43:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:26,871 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-10-14 21:43:26,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:26,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2019-10-14 21:43:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:26,873 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:43:26,873 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:43:26,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 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 21:43:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:43:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-10-14 21:43:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-14 21:43:26,881 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 51 [2019-10-14 21:43:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:26,881 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-14 21:43:26,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-14 21:43:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:26,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,882 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:27,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,088 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -801206728, now seen corresponding path program 5 times [2019-10-14 21:43:27,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735867621] [2019-10-14 21:43:27,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:43:27,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735867621] [2019-10-14 21:43:27,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611378895] [2019-10-14 21:43:27,221 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:43:27,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:27,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:27,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:43:27,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:27,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:43:27,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468238850] [2019-10-14 21:43:27,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:27,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:27,785 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 12 states. [2019-10-14 21:43:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,985 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2019-10-14 21:43:27,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:27,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2019-10-14 21:43:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,991 INFO L225 Difference]: With dead ends: 117 [2019-10-14 21:43:27,992 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:43:27,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:43:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2019-10-14 21:43:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:43:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-10-14 21:43:28,004 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2019-10-14 21:43:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:28,005 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-10-14 21:43:28,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-10-14 21:43:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:43:28,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:28,007 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:28,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:28,212 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -371655764, now seen corresponding path program 6 times [2019-10-14 21:43:28,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:28,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868177050] [2019-10-14 21:43:28,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:28,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:43:28,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868177050] [2019-10-14 21:43:28,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570610901] [2019-10-14 21:43:28,311 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:28,510 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:43:28,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:28,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:28,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:28,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:28,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:43:28,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341693745] [2019-10-14 21:43:28,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:43:28,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:43:28,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:43:28,560 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 14 states. [2019-10-14 21:43:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:28,812 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2019-10-14 21:43:28,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:43:28,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-10-14 21:43:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:28,814 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:43:28,814 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:43:28,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:43:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:43:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2019-10-14 21:43:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:43:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-10-14 21:43:28,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 65 [2019-10-14 21:43:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:28,823 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-10-14 21:43:28,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:43:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-10-14 21:43:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:43:28,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:28,825 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:29,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,033 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash 996125472, now seen corresponding path program 7 times [2019-10-14 21:43:29,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304128300] [2019-10-14 21:43:29,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:43:29,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304128300] [2019-10-14 21:43:29,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567735554] [2019-10-14 21:43:29,166 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:29,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:43:29,247 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:29,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:43:29,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804479369] [2019-10-14 21:43:29,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:29,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:29,249 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 12 states. [2019-10-14 21:43:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,328 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2019-10-14 21:43:29,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:29,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-10-14 21:43:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,329 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:43:29,329 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:43:29,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:43:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-14 21:43:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:43:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-10-14 21:43:29,338 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 77 [2019-10-14 21:43:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,338 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-10-14 21:43:29,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-10-14 21:43:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:43:29,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,340 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:29,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,544 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash -869743938, now seen corresponding path program 8 times [2019-10-14 21:43:29,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360973917] [2019-10-14 21:43:29,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:43:29,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360973917] [2019-10-14 21:43:29,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642825101] [2019-10-14 21:43:29,702 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:29,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:29,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:29,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:43:29,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:29,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:43:29,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823627263] [2019-10-14 21:43:29,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:29,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:29,835 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2019-10-14 21:43:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,978 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2019-10-14 21:43:29,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:29,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-10-14 21:43:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,979 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:43:29,980 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:43:29,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 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 21:43:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:43:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 21:43:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2019-10-14 21:43:29,995 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 79 [2019-10-14 21:43:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,997 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2019-10-14 21:43:29,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2019-10-14 21:43:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:30,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:30,001 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:30,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,214 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1326082780, now seen corresponding path program 9 times [2019-10-14 21:43:30,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:30,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144154824] [2019-10-14 21:43:30,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:43:30,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144154824] [2019-10-14 21:43:30,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147442845] [2019-10-14 21:43:30,345 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:43:30,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:30,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:30,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:43:30,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:30,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-10-14 21:43:30,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11965866] [2019-10-14 21:43:30,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:43:30,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:43:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:30,777 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 18 states. [2019-10-14 21:43:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:31,092 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-10-14 21:43:31,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:43:31,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-10-14 21:43:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:31,093 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:43:31,093 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:43:31,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:43:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2019-10-14 21:43:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:43:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-10-14 21:43:31,108 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 81 [2019-10-14 21:43:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:31,108 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-10-14 21:43:31,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:43:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-10-14 21:43:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 21:43:31,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:31,110 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:31,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,315 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1218403760, now seen corresponding path program 10 times [2019-10-14 21:43:31,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:31,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305287690] [2019-10-14 21:43:31,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-14 21:43:31,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305287690] [2019-10-14 21:43:31,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903189127] [2019-10-14 21:43:31,471 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:31,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:31,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:43:31,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-14 21:43:31,567 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:31,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:43:31,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52054384] [2019-10-14 21:43:31,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:31,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:31,570 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 15 states. [2019-10-14 21:43:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:31,665 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2019-10-14 21:43:31,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:43:31,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2019-10-14 21:43:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:31,667 INFO L225 Difference]: With dead ends: 172 [2019-10-14 21:43:31,667 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:43:31,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:43:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-10-14 21:43:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:43:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2019-10-14 21:43:31,674 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 93 [2019-10-14 21:43:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:31,675 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2019-10-14 21:43:31,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2019-10-14 21:43:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:43:31,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:31,676 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:31,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,880 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1577927186, now seen corresponding path program 11 times [2019-10-14 21:43:31,881 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:31,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389494031] [2019-10-14 21:43:31,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-14 21:43:32,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389494031] [2019-10-14 21:43:32,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901197385] [2019-10-14 21:43:32,041 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true