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_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:11,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:11,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:11,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:11,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:11,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:11,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:11,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:11,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:11,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:11,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:11,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:11,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:11,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:11,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:11,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:11,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:11,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:11,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:11,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:11,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:11,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:11,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:11,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:11,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:11,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:11,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:11,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:11,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:11,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:11,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:11,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:11,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:11,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:11,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:11,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:11,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:43:11,924 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:11,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:11,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:11,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:11,927 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:11,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:11,928 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:11,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:11,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:11,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:11,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:11,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:11,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:11,931 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:11,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:11,931 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:11,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:11,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:11,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:11,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:11,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:11,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:11,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:11,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:11,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:11,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:11,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:11,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:11,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:12,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:12,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:12,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:12,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:12,223 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:12,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-10-14 21:43:12,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff643d63f/956b8283297e4d5d84bef027ba42df51/FLAG533a03c97 [2019-10-14 21:43:12,768 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:12,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-10-14 21:43:12,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff643d63f/956b8283297e4d5d84bef027ba42df51/FLAG533a03c97 [2019-10-14 21:43:13,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff643d63f/956b8283297e4d5d84bef027ba42df51 [2019-10-14 21:43:13,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:13,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:13,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:13,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:13,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:13,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0511c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13, skipping insertion in model container [2019-10-14 21:43:13,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,164 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:13,182 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:13,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:13,343 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:13,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:13,383 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:13,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13 WrapperNode [2019-10-14 21:43:13,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:13,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:13,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:13,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:13,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... [2019-10-14 21:43:13,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:13,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:13,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:13,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:13,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:13,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:13,891 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:13,891 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:43:13,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:13 BoogieIcfgContainer [2019-10-14 21:43:13,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:13,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:13,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:13,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:13,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:13" (1/3) ... [2019-10-14 21:43:13,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecf8296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:13, skipping insertion in model container [2019-10-14 21:43:13,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:13" (2/3) ... [2019-10-14 21:43:13,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecf8296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:13, skipping insertion in model container [2019-10-14 21:43:13,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:13" (3/3) ... [2019-10-14 21:43:13,901 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-10-14 21:43:13,910 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:13,918 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:13,927 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:13,952 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:13,952 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:13,952 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:13,952 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:13,952 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:13,952 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:13,953 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:13,953 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-14 21:43:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:43:13,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,975 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:13,977 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2019-10-14 21:43:13,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:13,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366084127] [2019-10-14 21:43:13,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:14,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366084127] [2019-10-14 21:43:14,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:14,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:14,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191711920] [2019-10-14 21:43:14,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:14,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:14,187 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-10-14 21:43:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,301 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-10-14 21:43:14,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:14,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:43:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,310 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:43:14,310 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:43:14,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:43:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:43:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:43:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:43:14,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-14 21:43:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,358 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:43:14,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:43:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:43:14,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,360 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,360 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2019-10-14 21:43:14,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110692909] [2019-10-14 21:43:14,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:14,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110692909] [2019-10-14 21:43:14,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:14,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:14,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057411375] [2019-10-14 21:43:14,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:14,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:14,493 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2019-10-14 21:43:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,588 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-14 21:43:14,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:14,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:43:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,590 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:43:14,591 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:43:14,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:43:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 21:43:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:43:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-14 21:43:14,607 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2019-10-14 21:43:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,607 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-14 21:43:14,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-14 21:43:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:14,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,612 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,613 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1114616120, now seen corresponding path program 1 times [2019-10-14 21:43:14,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799079742] [2019-10-14 21:43:14,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:14,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799079742] [2019-10-14 21:43:14,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:14,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:14,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192163668] [2019-10-14 21:43:14,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:14,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:14,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:14,754 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2019-10-14 21:43:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,842 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-14 21:43:14,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:14,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:43:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,846 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:43:14,846 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:43:14,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:43:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-14 21:43:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:43:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-14 21:43:14,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2019-10-14 21:43:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,854 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-14 21:43:14,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-14 21:43:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:14,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,855 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,856 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2019-10-14 21:43:14,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967722653] [2019-10-14 21:43:14,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:43:14,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967722653] [2019-10-14 21:43:14,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971547748] [2019-10-14 21:43:14,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:43:15,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:15,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:15,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617057007] [2019-10-14 21:43:15,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:15,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:15,043 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2019-10-14 21:43:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,164 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-14 21:43:15,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:15,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 21:43:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,166 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:43:15,166 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:43:15,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:43:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 21:43:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:43:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-14 21:43:15,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2019-10-14 21:43:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,179 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-14 21:43:15,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-14 21:43:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:15,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,183 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,385 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash -425990958, now seen corresponding path program 2 times [2019-10-14 21:43:15,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137780598] [2019-10-14 21:43:15,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:43:15,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137780598] [2019-10-14 21:43:15,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575192803] [2019-10-14 21:43:15,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:15,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:15,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:15,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:15,572 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:15,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:43:15,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011621630] [2019-10-14 21:43:15,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:43:15,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:43:15,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:15,574 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-10-14 21:43:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,696 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:43:15,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:15,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-14 21:43:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,697 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:43:15,697 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:43:15,698 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:43:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-14 21:43:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:43:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-10-14 21:43:15,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2019-10-14 21:43:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,710 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-10-14 21:43:15,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:43:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-10-14 21:43:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:43:15,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,712 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,917 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2001812716, now seen corresponding path program 3 times [2019-10-14 21:43:15,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054852409] [2019-10-14 21:43:15,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:43:16,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054852409] [2019-10-14 21:43:16,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658253544] [2019-10-14 21:43:16,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:16,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:16,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:16,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:16,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:43:16,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:16,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:43:16,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031008543] [2019-10-14 21:43:16,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:16,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:16,145 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2019-10-14 21:43:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:16,304 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-10-14 21:43:16,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:16,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-14 21:43:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:16,306 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:43:16,306 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:16,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-10-14 21:43:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:43:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-14 21:43:16,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 31 [2019-10-14 21:43:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:16,320 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-14 21:43:16,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-14 21:43:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:43:16,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:16,324 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:16,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:16,539 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1767528838, now seen corresponding path program 4 times [2019-10-14 21:43:16,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:16,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3144508] [2019-10-14 21:43:16,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:16,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3144508] [2019-10-14 21:43:16,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452453747] [2019-10-14 21:43:16,686 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:16,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:16,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:16,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:16,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:43:16,819 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:16,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 21:43:16,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999703474] [2019-10-14 21:43:16,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:16,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:16,822 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2019-10-14 21:43:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:16,996 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2019-10-14 21:43:16,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:16,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-14 21:43:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:16,997 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:43:16,997 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:43:16,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:43:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-14 21:43:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:43:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-10-14 21:43:17,005 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2019-10-14 21:43:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:17,005 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-10-14 21:43:17,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-10-14 21:43:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:43:17,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:17,007 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:17,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:17,211 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -318121312, now seen corresponding path program 5 times [2019-10-14 21:43:17,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:17,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796647146] [2019-10-14 21:43:17,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:43:17,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796647146] [2019-10-14 21:43:17,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809670283] [2019-10-14 21:43:17,388 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:17,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:43:17,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:17,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:17,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:43:17,936 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:17,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:43:17,936 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713173144] [2019-10-14 21:43:17,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:17,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:17,938 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 9 states. [2019-10-14 21:43:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,067 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-10-14 21:43:18,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:18,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-10-14 21:43:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,072 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:43:18,073 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:43:18,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:43:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-14 21:43:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:43:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-14 21:43:18,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2019-10-14 21:43:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,081 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-14 21:43:18,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-14 21:43:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:43:18,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,082 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,286 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash -249467492, now seen corresponding path program 6 times [2019-10-14 21:43:18,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238048490] [2019-10-14 21:43:18,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:43:18,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238048490] [2019-10-14 21:43:18,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256877328] [2019-10-14 21:43:18,412 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:43:18,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:18,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:43:18,577 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:18,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:43:18,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343421868] [2019-10-14 21:43:18,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:18,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:18,579 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 15 states. [2019-10-14 21:43:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,750 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2019-10-14 21:43:18,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:43:18,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2019-10-14 21:43:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,752 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:43:18,752 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:43:18,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:43:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-10-14 21:43:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-10-14 21:43:18,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2019-10-14 21:43:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,760 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-10-14 21:43:18,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-10-14 21:43:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:18,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,761 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,973 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1592097226, now seen corresponding path program 7 times [2019-10-14 21:43:18,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078593170] [2019-10-14 21:43:18,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:19,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078593170] [2019-10-14 21:43:19,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263836452] [2019-10-14 21:43:19,116 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:43:19,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:19,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:43:19,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039107476] [2019-10-14 21:43:19,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:43:19,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:43:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:19,246 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 11 states. [2019-10-14 21:43:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,390 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2019-10-14 21:43:19,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:19,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-10-14 21:43:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,391 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:43:19,391 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:43:19,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:43:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-10-14 21:43:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:43:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-10-14 21:43:19,399 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2019-10-14 21:43:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,399 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-10-14 21:43:19,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:43:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-10-14 21:43:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:43:19,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,401 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:19,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,605 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -263288236, now seen corresponding path program 8 times [2019-10-14 21:43:19,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:19,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100086538] [2019-10-14 21:43:19,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:19,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100086538] [2019-10-14 21:43:19,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792247633] [2019-10-14 21:43:19,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:19,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:19,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:19,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:19,811 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:43:19,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925181998] [2019-10-14 21:43:19,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:19,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:19,813 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 12 states. [2019-10-14 21:43:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,891 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2019-10-14 21:43:19,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:19,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-10-14 21:43:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,892 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:43:19,892 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:43:19,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:43:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-14 21:43:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:43:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-10-14 21:43:19,899 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2019-10-14 21:43:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,900 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-10-14 21:43:19,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-10-14 21:43:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:43:19,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,901 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:20,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,106 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1116864242, now seen corresponding path program 9 times [2019-10-14 21:43:20,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:20,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946837459] [2019-10-14 21:43:20,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:20,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946837459] [2019-10-14 21:43:20,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800911882] [2019-10-14 21:43:20,242 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 21:43:20,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:21,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:43:21,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:43:21,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:21,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-10-14 21:43:21,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28412544] [2019-10-14 21:43:21,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:43:21,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:43:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:21,121 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 21 states. [2019-10-14 21:43:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:21,381 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2019-10-14 21:43:21,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:43:21,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2019-10-14 21:43:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:21,382 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:43:21,383 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:43:21,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:43:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:43:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:43:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-10-14 21:43:21,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 57 [2019-10-14 21:43:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:21,391 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-10-14 21:43:21,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:43:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-10-14 21:43:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:43:21,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:21,393 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:21,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,599 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -967554040, now seen corresponding path program 10 times [2019-10-14 21:43:21,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:21,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660927080] [2019-10-14 21:43:21,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:43:21,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660927080] [2019-10-14 21:43:21,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834211410] [2019-10-14 21:43:21,789 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:21,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:21,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:43:21,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:43:22,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-10-14 21:43:22,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997763796] [2019-10-14 21:43:22,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:22,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:22,044 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 22 states. [2019-10-14 21:43:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,254 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-10-14 21:43:22,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:43:22,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-10-14 21:43:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,255 INFO L225 Difference]: With dead ends: 128 [2019-10-14 21:43:22,256 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:43:22,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:43:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2019-10-14 21:43:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:43:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-10-14 21:43:22,266 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2019-10-14 21:43:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,267 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-10-14 21:43:22,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-10-14 21:43:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:43:22,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,268 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:22,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,479 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1991451554, now seen corresponding path program 11 times [2019-10-14 21:43:22,480 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607286647] [2019-10-14 21:43:22,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-10-14 21:43:22,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607286647] [2019-10-14 21:43:22,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697760878] [2019-10-14 21:43:22,634 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true