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_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:20,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:20,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:20,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:20,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:20,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:20,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:20,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:20,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:20,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:20,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:20,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:20,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:20,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:20,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:20,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:20,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:20,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:20,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:20,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:20,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:20,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:20,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:20,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:20,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:20,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:20,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:20,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:20,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:20,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:20,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:20,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:20,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:20,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:20,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:20,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:20,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:45:20,878 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:20,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:20,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:20,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:20,881 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:20,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:20,881 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:20,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:20,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:20,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:20,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:20,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:20,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:20,885 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:20,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:20,885 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:20,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:20,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:20,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:20,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:20,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:20,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:20,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:20,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:20,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:20,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:20,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:20,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:20,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:21,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:21,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:21,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:21,176 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:21,176 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:21,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-10-14 21:45:21,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bba92595/a660000af92b4d539665acb8ab36efe3/FLAG20ae09a9d [2019-10-14 21:45:21,703 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:21,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-10-14 21:45:21,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bba92595/a660000af92b4d539665acb8ab36efe3/FLAG20ae09a9d [2019-10-14 21:45:22,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bba92595/a660000af92b4d539665acb8ab36efe3 [2019-10-14 21:45:22,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:22,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:22,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:22,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:22,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:22,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,142 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 09:45:22, skipping insertion in model container [2019-10-14 21:45:22,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,149 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:22,168 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:22,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:22,386 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:22,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:22,514 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:22,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22 WrapperNode [2019-10-14 21:45:22,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:22,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:22,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:22,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:22,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... [2019-10-14 21:45:22,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:22,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:22,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:22,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:22,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:22,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:22,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:22,964 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:22,965 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-14 21:45:22,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:22 BoogieIcfgContainer [2019-10-14 21:45:22,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:22,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:22,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:22,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:22,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:22" (1/3) ... [2019-10-14 21:45:22,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45673b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:22, skipping insertion in model container [2019-10-14 21:45:22,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:22" (2/3) ... [2019-10-14 21:45:22,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45673b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:22, skipping insertion in model container [2019-10-14 21:45:22,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:22" (3/3) ... [2019-10-14 21:45:22,995 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2019-10-14 21:45:23,015 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:23,034 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:23,045 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:23,067 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:23,067 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:23,067 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:23,068 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:23,068 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:23,068 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:23,068 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:23,068 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-14 21:45:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:23,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,095 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2019-10-14 21:45:23,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167466974] [2019-10-14 21:45:23,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:23,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167466974] [2019-10-14 21:45:23,288 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:23,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:23,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678131530] [2019-10-14 21:45:23,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:23,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:23,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:23,313 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-14 21:45:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,469 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2019-10-14 21:45:23,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:23,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-14 21:45:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,480 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:45:23,480 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:45:23,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:45:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:45:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:45:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-14 21:45:23,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2019-10-14 21:45:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,532 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-14 21:45:23,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-14 21:45:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:23,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,534 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,535 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2019-10-14 21:45:23,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5622649] [2019-10-14 21:45:23,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:23,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5622649] [2019-10-14 21:45:23,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:23,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:23,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701619415] [2019-10-14 21:45:23,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:23,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:23,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:23,631 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-14 21:45:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,830 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2019-10-14 21:45:23,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:23,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:45:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,832 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:45:23,832 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:45:23,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:45:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:45:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:45:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:45:23,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-10-14 21:45:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,845 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:45:23,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:45:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:45:23,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,846 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, 1, 1, 1] [2019-10-14 21:45:23,847 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2019-10-14 21:45:23,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808555403] [2019-10-14 21:45:23,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:45:23,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808555403] [2019-10-14 21:45:23,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973543856] [2019-10-14 21:45:23,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:24,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:45:24,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:24,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:24,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440118188] [2019-10-14 21:45:24,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:24,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:24,123 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 6 states. [2019-10-14 21:45:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:24,306 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-10-14 21:45:24,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:24,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-10-14 21:45:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:24,308 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:45:24,309 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:24,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:45:24,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2019-10-14 21:45:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:24,322 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:45:24,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:45:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:24,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:24,324 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:24,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,537 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2019-10-14 21:45:24,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:24,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489021036] [2019-10-14 21:45:24,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:24,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489021036] [2019-10-14 21:45:24,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918274209] [2019-10-14 21:45:24,655 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:24,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:24,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:24,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:24,749 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:24,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:24,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341174939] [2019-10-14 21:45:24,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:24,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:24,753 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2019-10-14 21:45:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:24,943 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2019-10-14 21:45:24,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:24,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 21:45:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:24,946 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:45:24,946 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:45:24,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:45:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 21:45:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:45:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-10-14 21:45:24,966 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2019-10-14 21:45:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:24,968 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-10-14 21:45:24,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-10-14 21:45:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:45:24,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:24,970 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:25,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:25,176 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2019-10-14 21:45:25,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:25,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862609311] [2019-10-14 21:45:25,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:45:25,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862609311] [2019-10-14 21:45:25,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114610241] [2019-10-14 21:45:25,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:25,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:25,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:25,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:25,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:45:25,546 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:25,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:25,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939167368] [2019-10-14 21:45:25,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:25,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:25,550 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 8 states. [2019-10-14 21:45:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:25,768 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-10-14 21:45:25,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:25,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-14 21:45:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:25,772 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:45:25,772 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:45:25,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:45:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-14 21:45:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:45:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 21:45:25,794 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2019-10-14 21:45:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:25,795 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 21:45:25,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 21:45:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:45:25,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:25,797 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:26,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,010 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:26,011 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2019-10-14 21:45:26,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:26,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201245893] [2019-10-14 21:45:26,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:45:26,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201245893] [2019-10-14 21:45:26,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910708683] [2019-10-14 21:45:26,146 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:26,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:26,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:26,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:45:26,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:26,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:26,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660149826] [2019-10-14 21:45:26,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:26,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:26,252 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2019-10-14 21:45:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:26,424 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-10-14 21:45:26,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:26,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2019-10-14 21:45:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:26,426 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:45:26,426 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:45:26,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:45:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-14 21:45:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:45:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-10-14 21:45:26,436 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2019-10-14 21:45:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:26,437 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-10-14 21:45:26,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-10-14 21:45:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:45:26,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:26,439 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:26,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,650 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2019-10-14 21:45:26,652 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:26,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571072310] [2019-10-14 21:45:26,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 21:45:26,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571072310] [2019-10-14 21:45:26,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151221851] [2019-10-14 21:45:26,795 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