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-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:49:14,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:14,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:14,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:14,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:14,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:14,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:14,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:14,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:14,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:14,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:14,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:14,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:14,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:14,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:14,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:14,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:14,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:14,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:14,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:14,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:14,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:14,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:14,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:14,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:49:14,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:14,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:14,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:14,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:14,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:14,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:14,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:14,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:14,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:14,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:14,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:14,705 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 21:49:14,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:14,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:14,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:14,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:14,720 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:14,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:14,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:14,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:14,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:14,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:14,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:14,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:14,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:14,722 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:14,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:14,722 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:14,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:14,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:14,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:14,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:14,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:14,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:14,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:14,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:14,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:14,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:14,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:14,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:14,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:14,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:15,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:15,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:15,014 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:15,014 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:15,015 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-10-14 21:49:15,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99dd8d769/6741e2b685b0404c935adf11e3736385/FLAG8417ffafa [2019-10-14 21:49:15,450 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:15,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-10-14 21:49:15,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99dd8d769/6741e2b685b0404c935adf11e3736385/FLAG8417ffafa [2019-10-14 21:49:15,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99dd8d769/6741e2b685b0404c935adf11e3736385 [2019-10-14 21:49:15,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:15,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:15,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:15,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:15,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:15,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:15" (1/1) ... [2019-10-14 21:49:15,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:15, skipping insertion in model container [2019-10-14 21:49:15,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:15" (1/1) ... [2019-10-14 21:49:15,909 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:15,926 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:16,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:16,123 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:16,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:16,161 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:16,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16 WrapperNode [2019-10-14 21:49:16,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:16,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:16,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:16,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:16,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (1/1) ... [2019-10-14 21:49:16,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:16,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:16,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:16,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:16,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (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 21:49:16,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:16,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:16,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:16,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:49:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:16,590 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:16,590 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:49:16,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:16 BoogieIcfgContainer [2019-10-14 21:49:16,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:16,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:16,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:16,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:16,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:15" (1/3) ... [2019-10-14 21:49:16,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe2d439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:16, skipping insertion in model container [2019-10-14 21:49:16,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:16" (2/3) ... [2019-10-14 21:49:16,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe2d439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:16, skipping insertion in model container [2019-10-14 21:49:16,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:16" (3/3) ... [2019-10-14 21:49:16,616 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-10-14 21:49:16,646 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:16,654 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:16,683 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:16,734 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:16,735 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:16,735 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:16,735 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:16,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:16,736 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:16,736 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:16,736 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:49:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:16,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:16,766 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:16,768 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-10-14 21:49:16,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:16,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541435078] [2019-10-14 21:49:16,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:16,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:16,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:16,963 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 21:49:16,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541435078] [2019-10-14 21:49:16,965 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:16,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:16,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286107487] [2019-10-14 21:49:16,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:16,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:16,985 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:49:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:17,083 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-10-14 21:49:17,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:17,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:49:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:17,094 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:49:17,095 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:49:17,098 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 21:49:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:49:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:49:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:49:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 21:49:17,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-10-14 21:49:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:17,136 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 21:49:17,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 21:49:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:17,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:17,138 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:17,139 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-10-14 21:49:17,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:17,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293675189] [2019-10-14 21:49:17,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:17,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:17,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:17,214 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 21:49:17,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293675189] [2019-10-14 21:49:17,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:17,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:17,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288603593] [2019-10-14 21:49:17,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:17,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:17,218 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-10-14 21:49:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:17,343 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-10-14 21:49:17,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:17,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:49:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:17,345 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:49:17,346 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:49:17,347 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 21:49:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:49:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-10-14 21:49:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:49:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:49:17,359 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-14 21:49:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:17,360 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:49:17,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:49:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:49:17,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:17,364 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] [2019-10-14 21:49:17,364 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-10-14 21:49:17,366 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:17,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991099173] [2019-10-14 21:49:17,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:17,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:17,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:49:17,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991099173] [2019-10-14 21:49:17,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848457014] [2019-10-14 21:49:17,502 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 21:49:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:17,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:17,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:49:17,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:17,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:49:17,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358241064] [2019-10-14 21:49:17,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:17,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:17,598 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-10-14 21:49:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:17,791 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-10-14 21:49:17,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:49:17,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-10-14 21:49:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:17,794 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:49:17,794 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:49:17,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:49:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:49:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-14 21:49:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:49:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-10-14 21:49:17,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-10-14 21:49:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:17,805 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-10-14 21:49:17,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-10-14 21:49:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:49:17,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:17,806 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:18,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:18,014 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-10-14 21:49:18,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:18,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415554930] [2019-10-14 21:49:18,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:18,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:18,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:49:18,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415554930] [2019-10-14 21:49:18,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957547786] [2019-10-14 21:49:18,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:18,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:18,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:49:18,336 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:18,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-10-14 21:49:18,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46476775] [2019-10-14 21:49:18,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:49:18,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:49:18,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:49:18,340 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 16 states. [2019-10-14 21:49:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:19,029 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-10-14 21:49:19,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:49:19,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2019-10-14 21:49:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:19,032 INFO L225 Difference]: With dead ends: 130 [2019-10-14 21:49:19,032 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:49:19,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:49:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:49:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-10-14 21:49:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:49:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-10-14 21:49:19,057 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-10-14 21:49:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:19,057 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-10-14 21:49:19,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:49:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-10-14 21:49:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:49:19,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:19,060 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:19,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:19,265 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-10-14 21:49:19,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:19,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987653178] [2019-10-14 21:49:19,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:19,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:19,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:49:19,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987653178] [2019-10-14 21:49:19,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760827586] [2019-10-14 21:49:19,552 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 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 21:49:19,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:19,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:19,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:49:19,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:49:19,790 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:19,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-10-14 21:49:19,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092049704] [2019-10-14 21:49:19,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:49:19,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:49:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:19,795 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 27 states. [2019-10-14 21:49:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:21,137 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-10-14 21:49:21,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:49:21,138 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-10-14 21:49:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:21,140 INFO L225 Difference]: With dead ends: 271 [2019-10-14 21:49:21,140 INFO L226 Difference]: Without dead ends: 204 [2019-10-14 21:49:21,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1145, Invalid=3145, Unknown=0, NotChecked=0, Total=4290 [2019-10-14 21:49:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-10-14 21:49:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-10-14 21:49:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-14 21:49:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-10-14 21:49:21,163 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-10-14 21:49:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:21,163 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-10-14 21:49:21,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:49:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-10-14 21:49:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:21,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:21,168 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:21,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:21,377 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:21,378 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-10-14 21:49:21,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:21,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490933060] [2019-10-14 21:49:21,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:21,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:21,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:49:21,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490933060] [2019-10-14 21:49:21,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729554208] [2019-10-14 21:49:21,818 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 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 21:49:21,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:49:21,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:21,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:21,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:49:21,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:21,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [27] total 29 [2019-10-14 21:49:21,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122050819] [2019-10-14 21:49:21,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:21,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:21,972 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 4 states. [2019-10-14 21:49:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:22,032 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2019-10-14 21:49:22,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:22,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-14 21:49:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:22,034 INFO L225 Difference]: With dead ends: 198 [2019-10-14 21:49:22,034 INFO L226 Difference]: Without dead ends: 148 [2019-10-14 21:49:22,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-14 21:49:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-10-14 21:49:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 21:49:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2019-10-14 21:49:22,052 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 81 [2019-10-14 21:49:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:22,052 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2019-10-14 21:49:22,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2019-10-14 21:49:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:22,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:22,054 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:22,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:22,258 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash -973963898, now seen corresponding path program 4 times [2019-10-14 21:49:22,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:22,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847779953] [2019-10-14 21:49:22,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:22,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:22,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 21:49:22,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847779953] [2019-10-14 21:49:22,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241042845] [2019-10-14 21:49:22,636 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 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 21:49:22,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:22,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:22,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:22,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-10-14 21:49:22,730 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:22,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2019-10-14 21:49:22,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001428683] [2019-10-14 21:49:22,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:22,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:22,732 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand 4 states. [2019-10-14 21:49:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:22,777 INFO L93 Difference]: Finished difference Result 203 states and 253 transitions. [2019-10-14 21:49:22,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:22,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-14 21:49:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:22,778 INFO L225 Difference]: With dead ends: 203 [2019-10-14 21:49:22,779 INFO L226 Difference]: Without dead ends: 138 [2019-10-14 21:49:22,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-14 21:49:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2019-10-14 21:49:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:49:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2019-10-14 21:49:22,791 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 81 [2019-10-14 21:49:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:22,792 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2019-10-14 21:49:22,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2019-10-14 21:49:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:22,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:22,794 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:22,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:22,997 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1175258490, now seen corresponding path program 5 times [2019-10-14 21:49:22,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:22,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348589906] [2019-10-14 21:49:22,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:22,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:22,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 21:49:23,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348589906] [2019-10-14 21:49:23,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825333879] [2019-10-14 21:49:23,224 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 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