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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:25,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:25,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:25,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:25,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:25,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:25,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:25,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:25,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:25,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:25,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:25,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:25,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:25,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:25,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:25,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:25,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:25,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:25,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:25,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:25,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:25,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:25,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:25,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:25,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:15:25,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:25,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:25,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:25,894 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 [2019-10-13 19:15:25,910 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:25,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:25,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:25,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:25,912 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:25,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:25,912 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:25,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:25,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:25,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:25,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:25,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:25,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:25,914 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:25,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:25,914 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:25,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:25,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:25,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:25,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:25,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:25,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:25,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:25,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:25,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:25,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:25,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:25,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:25,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:26,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:26,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:26,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:26,251 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:26,251 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:26,252 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-10-13 19:15:26,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a990195/5d330a5cbe4640fc9e52af643cf2e6fc/FLAGc997b5179 [2019-10-13 19:15:26,797 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:26,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-10-13 19:15:26,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a990195/5d330a5cbe4640fc9e52af643cf2e6fc/FLAGc997b5179 [2019-10-13 19:15:27,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a990195/5d330a5cbe4640fc9e52af643cf2e6fc [2019-10-13 19:15:27,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:27,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:27,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:27,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:27,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:27,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbac132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27, skipping insertion in model container [2019-10-13 19:15:27,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:27,186 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:27,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:27,417 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:27,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:27,459 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:27,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27 WrapperNode [2019-10-13 19:15:27,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:27,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:27,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:27,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:27,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2019-10-13 19:15:27,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:27,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:27,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:27,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:27,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (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 [2019-10-13 19:15:27,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:27,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:27,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:27,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:15:27,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:15:27,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:15:27,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:27,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:27,874 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:27,874 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:15:27,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:27 BoogieIcfgContainer [2019-10-13 19:15:27,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:27,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:27,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:27,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:27,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:27" (1/3) ... [2019-10-13 19:15:27,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4744856c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:27, skipping insertion in model container [2019-10-13 19:15:27,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (2/3) ... [2019-10-13 19:15:27,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4744856c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:27, skipping insertion in model container [2019-10-13 19:15:27,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:27" (3/3) ... [2019-10-13 19:15:27,907 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2019-10-13 19:15:27,919 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:27,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:27,968 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:27,997 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:27,998 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:27,998 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:27,998 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:27,998 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:27,998 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:27,998 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:27,999 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 19:15:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:15:28,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:28,022 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:28,024 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1821336840, now seen corresponding path program 1 times [2019-10-13 19:15:28,035 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:28,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809865579] [2019-10-13 19:15:28,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:28,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809865579] [2019-10-13 19:15:28,195 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:28,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:15:28,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634459588] [2019-10-13 19:15:28,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:15:28,200 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:28,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:15:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:28,217 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-13 19:15:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:28,309 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-13 19:15:28,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:15:28,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-13 19:15:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:28,320 INFO L225 Difference]: With dead ends: 40 [2019-10-13 19:15:28,320 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 19:15:28,324 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 [2019-10-13 19:15:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 19:15:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 19:15:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 19:15:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-13 19:15:28,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-10-13 19:15:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:28,365 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-13 19:15:28,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:15:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-13 19:15:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:15:28,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:28,367 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:28,367 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1443575666, now seen corresponding path program 1 times [2019-10-13 19:15:28,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:28,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885950851] [2019-10-13 19:15:28,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:28,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885950851] [2019-10-13 19:15:28,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:28,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:15:28,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300513734] [2019-10-13 19:15:28,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:15:28,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:15:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:28,489 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2019-10-13 19:15:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:28,573 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-13 19:15:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:28,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 19:15:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:28,576 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:15:28,576 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:15:28,578 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 [2019-10-13 19:15:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:15:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2019-10-13 19:15:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:15:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-13 19:15:28,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-10-13 19:15:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:28,589 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-13 19:15:28,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:15:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-13 19:15:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:15:28,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:28,591 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:28,591 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:28,592 INFO L82 PathProgramCache]: Analyzing trace with hash 31729808, now seen corresponding path program 1 times [2019-10-13 19:15:28,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:28,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641137002] [2019-10-13 19:15:28,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:28,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:28,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641137002] [2019-10-13 19:15:28,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033396609] [2019-10-13 19:15:28,723 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 [2019-10-13 19:15:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:28,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:15:28,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:28,872 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 19:15:28,873 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:28,882 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:28,883 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:28,883 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2019-10-13 19:15:28,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:28,945 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:15:28,946 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:15:28,949 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2019-10-13 19:15:28,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:28,955 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:28,956 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:28,970 INFO L567 ElimStorePlain]: treesize reduction 10, result has 47.4 percent of original size [2019-10-13 19:15:28,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:28,971 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:9 [2019-10-13 19:15:28,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:29,017 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:29,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2019-10-13 19:15:29,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498495694] [2019-10-13 19:15:29,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:15:29,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:15:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:29,019 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-10-13 19:15:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:29,247 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2019-10-13 19:15:29,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:29,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-13 19:15:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:29,248 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:15:29,249 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:15:29,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:15:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-10-13 19:15:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:15:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-10-13 19:15:29,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 15 [2019-10-13 19:15:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:29,258 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-10-13 19:15:29,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:15:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-10-13 19:15:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:15:29,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,259 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:29,463 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash -744847771, now seen corresponding path program 1 times [2019-10-13 19:15:29,465 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638567369] [2019-10-13 19:15:29,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:29,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638567369] [2019-10-13 19:15:29,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530155391] [2019-10-13 19:15:29,645 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 [2019-10-13 19:15:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:15:29,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:29,754 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:29,755 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:29,775 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-10-13 19:15:29,779 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-10-13 19:15:29,779 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:29,788 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:29,791 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:29,791 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-10-13 19:15:30,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:30,022 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:30,023 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:30,034 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:30,035 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2019-10-13 19:15:30,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:30,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:30,038 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:30,070 INFO L567 ElimStorePlain]: treesize reduction 27, result has 42.6 percent of original size [2019-10-13 19:15:30,071 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:30,071 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-10-13 19:15:30,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:30,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 13 [2019-10-13 19:15:30,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019682882] [2019-10-13 19:15:30,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:15:30,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:15:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:15:30,140 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2019-10-13 19:15:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:38,811 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2019-10-13 19:15:38,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:15:38,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-10-13 19:15:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:38,813 INFO L225 Difference]: With dead ends: 62 [2019-10-13 19:15:38,813 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:15:38,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:15:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:15:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-13 19:15:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:15:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-13 19:15:38,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2019-10-13 19:15:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:38,827 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-13 19:15:38,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:15:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-13 19:15:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:15:38,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:38,829 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:39,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:39,030 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 344641978, now seen corresponding path program 2 times [2019-10-13 19:15:39,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:39,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765868233] [2019-10-13 19:15:39,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:15:39,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765868233] [2019-10-13 19:15:39,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194755104] [2019-10-13 19:15:39,212 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 [2019-10-13 19:15:39,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:39,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:39,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 19:15:39,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:39,308 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:39,308 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:39,332 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-10-13 19:15:39,336 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-10-13 19:15:39,336 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:39,346 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:39,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:39,347 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-10-13 19:15:39,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:39,862 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:15:39,863 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:15:39,864 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2019-10-13 19:15:39,865 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:39,867 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:39,867 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:39,902 INFO L567 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2019-10-13 19:15:39,903 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:39,903 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-10-13 19:15:39,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:39,961 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:39,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 15 [2019-10-13 19:15:39,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765563623] [2019-10-13 19:15:39,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:15:39,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:39,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:15:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:39,963 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-10-13 19:15:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:49,151 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-10-13 19:15:49,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:15:49,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2019-10-13 19:15:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:49,154 INFO L225 Difference]: With dead ends: 80 [2019-10-13 19:15:49,155 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 19:15:49,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:15:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 19:15:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-10-13 19:15:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 19:15:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-13 19:15:49,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 35 [2019-10-13 19:15:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:49,178 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-13 19:15:49,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:15:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-13 19:15:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:15:49,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:49,181 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:49,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:49,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -579179889, now seen corresponding path program 3 times [2019-10-13 19:15:49,383 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:49,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697742501] [2019-10-13 19:15:49,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:49,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:49,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 19:15:49,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697742501] [2019-10-13 19:15:49,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630487753] [2019-10-13 19:15:49,588 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 [2019-10-13 19:15:49,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 19:15:49,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:49,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-13 19:15:49,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:49,880 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-10-13 19:15:49,881 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:49,909 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-10-13 19:15:49,909 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_9| vanished before elimination [2019-10-13 19:15:49,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:49,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:24 [2019-10-13 19:15:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 19:15:49,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:49,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-13 19:15:49,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692620293] [2019-10-13 19:15:49,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:15:49,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:15:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:49,952 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 14 states. [2019-10-13 19:15:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:50,237 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2019-10-13 19:15:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:15:50,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-10-13 19:15:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:50,240 INFO L225 Difference]: With dead ends: 94 [2019-10-13 19:15:50,240 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 19:15:50,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 19:15:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2019-10-13 19:15:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 19:15:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-13 19:15:50,254 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-10-13 19:15:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:50,255 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-13 19:15:50,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:15:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-13 19:15:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:15:50,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:50,256 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:50,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:50,461 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 9921453, now seen corresponding path program 4 times [2019-10-13 19:15:50,462 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:50,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070377624] [2019-10-13 19:15:50,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:50,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:50,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 19:15:50,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070377624] [2019-10-13 19:15:50,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247564281] [2019-10-13 19:15:50,627 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 [2019-10-13 19:15:50,683 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:50,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:50,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 19:15:50,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:50,705 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-10-13 19:15:50,706 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:50,747 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-10-13 19:15:50,747 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_10| vanished before elimination [2019-10-13 19:15:50,748 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:50,748 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-10-13 19:15:50,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:50,781 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:50,781 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:50,799 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:50,799 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 103 [2019-10-13 19:15:50,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:50,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:50,802 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:50,858 INFO L567 ElimStorePlain]: treesize reduction 35, result has 66.0 percent of original size [2019-10-13 19:15:50,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:50,860 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:50,860 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:65 [2019-10-13 19:15:50,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:51,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:51,432 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:51,432 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:51,441 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:51,441 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2019-10-13 19:15:51,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:51,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:51,443 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:51,470 INFO L567 ElimStorePlain]: treesize reduction 27, result has 42.6 percent of original size [2019-10-13 19:15:51,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:51,471 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-10-13 19:15:51,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 19:15:51,562 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:51,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 18 [2019-10-13 19:15:51,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826107750] [2019-10-13 19:15:51,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:15:51,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:15:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:15:51,564 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2019-10-13 19:16:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:01,423 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2019-10-13 19:16:01,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:16:01,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2019-10-13 19:16:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:01,425 INFO L225 Difference]: With dead ends: 104 [2019-10-13 19:16:01,426 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 19:16:01,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:16:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 19:16:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-10-13 19:16:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 19:16:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-10-13 19:16:01,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 47 [2019-10-13 19:16:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:01,440 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-10-13 19:16:01,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:16:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-10-13 19:16:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:16:01,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:01,441 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:01,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:01,645 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1484610690, now seen corresponding path program 5 times [2019-10-13 19:16:01,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:01,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745769916] [2019-10-13 19:16:01,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:01,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:01,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 19:16:01,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745769916] [2019-10-13 19:16:01,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102046971] [2019-10-13 19:16:01,831 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