java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:36,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:36,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:36,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:36,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:36,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:36,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:36,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:36,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:36,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:36,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:36,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:36,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:36,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:36,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:36,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:36,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:36,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:36,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:36,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:36,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:36,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:36,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:36,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:36,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:15:36,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:15:36,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:15:36,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:15:36,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:15:36,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:15:36,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:36,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:36,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:36,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:36,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:36,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:36,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:36,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:36,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:36,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:36,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:36,909 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 23:15:36,928 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:36,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:36,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:36,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:36,931 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:36,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:36,931 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:36,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:36,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:36,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:36,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:36,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:36,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:36,934 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:36,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:36,935 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:36,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:36,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:36,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:36,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:36,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:36,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:36,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:36,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:37,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:37,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:37,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:37,252 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:37,252 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:37,253 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2019-10-14 23:15:37,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84c211dcc/5746ff7da4374c86999f5b83a025012f/FLAGe48e2567b [2019-10-14 23:15:37,795 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:37,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2019-10-14 23:15:37,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84c211dcc/5746ff7da4374c86999f5b83a025012f/FLAGe48e2567b [2019-10-14 23:15:38,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84c211dcc/5746ff7da4374c86999f5b83a025012f [2019-10-14 23:15:38,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:38,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:38,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:38,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:38,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:38,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8461ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,178 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:38,199 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:38,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:38,450 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:38,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:38,491 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:38,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38 WrapperNode [2019-10-14 23:15:38,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:38,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:38,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:38,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:38,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:38,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:38,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:38,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:38,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (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 23:15:38,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:38,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:38,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:38,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:38,839 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:38,839 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:15:38,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38 BoogieIcfgContainer [2019-10-14 23:15:38,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:38,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:38,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:38,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:38,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:38" (1/3) ... [2019-10-14 23:15:38,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e9e2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (2/3) ... [2019-10-14 23:15:38,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e9e2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38" (3/3) ... [2019-10-14 23:15:38,850 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2019-10-14 23:15:38,859 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:38,867 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:38,877 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:38,899 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:38,900 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:38,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:38,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:38,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:38,900 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:38,900 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:38,901 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-14 23:15:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:15:38,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:38,926 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:38,928 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2019-10-14 23:15:38,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:38,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718831370] [2019-10-14 23:15:38,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:38,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:38,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,040 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 23:15:39,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718831370] [2019-10-14 23:15:39,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:15:39,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417697237] [2019-10-14 23:15:39,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:15:39,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:15:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:39,066 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-14 23:15:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,089 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-10-14 23:15:39,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:15:39,090 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:15:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,096 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:15:39,096 INFO L226 Difference]: Without dead ends: 12 [2019-10-14 23:15:39,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-14 23:15:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-14 23:15:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-14 23:15:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-10-14 23:15:39,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-10-14 23:15:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,134 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-10-14 23:15:39,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:15:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-10-14 23:15:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:15:39,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,135 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,136 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-10-14 23:15:39,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425618837] [2019-10-14 23:15:39,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,191 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 23:15:39,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425618837] [2019-10-14 23:15:39,195 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:15:39,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836094630] [2019-10-14 23:15:39,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:15:39,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:15:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:39,199 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-10-14 23:15:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,250 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-10-14 23:15:39,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:15:39,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-14 23:15:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,252 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:15:39,252 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:15:39,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:15:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:15:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:15:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:15:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-14 23:15:39,260 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-14 23:15:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,274 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-14 23:15:39,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:15:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-14 23:15:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:15:39,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,275 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,275 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2019-10-14 23:15:39,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214915178] [2019-10-14 23:15:39,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214915178] [2019-10-14 23:15:39,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708736533] [2019-10-14 23:15:39,328 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 23:15:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:15:39,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,413 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:39,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-10-14 23:15:39,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223696931] [2019-10-14 23:15:39,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:15:39,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:15:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:39,415 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-10-14 23:15:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,445 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-10-14 23:15:39,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:15:39,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-14 23:15:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,447 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:15:39,447 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:15:39,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:15:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-14 23:15:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:15:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-14 23:15:39,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-10-14 23:15:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,455 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-14 23:15:39,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:15:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-14 23:15:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:39,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,457 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:39,662 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2011681711, now seen corresponding path program 1 times [2019-10-14 23:15:39,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384376518] [2019-10-14 23:15:39,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384376518] [2019-10-14 23:15:39,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894929250] [2019-10-14 23:15:39,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:15:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:15:39,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,758 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:39,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-10-14 23:15:39,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883147074] [2019-10-14 23:15:39,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:39,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:39,761 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2019-10-14 23:15:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,804 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-10-14 23:15:39,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:15:39,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 23:15:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,807 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:15:39,807 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:15:39,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:15:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:15:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:15:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-14 23:15:39,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2019-10-14 23:15:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,815 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-14 23:15:39,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-14 23:15:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:39,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,816 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,026 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1891741908, now seen corresponding path program 2 times [2019-10-14 23:15:40,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942434726] [2019-10-14 23:15:40,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942434726] [2019-10-14 23:15:40,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254746753] [2019-10-14 23:15:40,101 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:40,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:40,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:15:40,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,158 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-14 23:15:40,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309050838] [2019-10-14 23:15:40,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:40,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:40,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:40,160 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2019-10-14 23:15:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,204 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-10-14 23:15:40,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:40,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-14 23:15:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,206 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:15:40,206 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:40,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:15:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:15:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 23:15:40,213 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-10-14 23:15:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,214 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 23:15:40,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 23:15:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:15:40,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,215 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,420 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1936086118, now seen corresponding path program 3 times [2019-10-14 23:15:40,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002796709] [2019-10-14 23:15:40,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002796709] [2019-10-14 23:15:40,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961699270] [2019-10-14 23:15:40,512 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:15:40,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:40,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:15:40,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:15:40,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-10-14 23:15:40,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280478665] [2019-10-14 23:15:40,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:15:40,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:15:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:40,588 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2019-10-14 23:15:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,658 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-14 23:15:40,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:40,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 23:15:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,663 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:15:40,663 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:15:40,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:15:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:15:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:15:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 23:15:40,671 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-10-14 23:15:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,671 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 23:15:40,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:15:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 23:15:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:15:40,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,673 INFO L380 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,885 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash 375097755, now seen corresponding path program 4 times [2019-10-14 23:15:40,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088332702] [2019-10-14 23:15:40,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:41,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088332702] [2019-10-14 23:15:41,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577107331] [2019-10-14 23:15:41,026 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:41,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:41,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:15:41,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:15:41,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:41,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2019-10-14 23:15:41,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413167628] [2019-10-14 23:15:41,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:41,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:41,072 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2019-10-14 23:15:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:41,130 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-10-14 23:15:41,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:15:41,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-14 23:15:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:41,133 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:15:41,133 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:15:41,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:15:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:15:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:15:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 23:15:41,140 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2019-10-14 23:15:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:41,141 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 23:15:41,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 23:15:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:15:41,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:41,142 INFO L380 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:41,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,346 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash -943476782, now seen corresponding path program 5 times [2019-10-14 23:15:41,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:41,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441582176] [2019-10-14 23:15:41,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:41,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441582176] [2019-10-14 23:15:41,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101475313] [2019-10-14 23:15:41,507 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:15:41,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:41,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:15:41,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:15:41,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:41,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2019-10-14 23:15:41,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432427004] [2019-10-14 23:15:41,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:41,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:41,587 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2019-10-14 23:15:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:41,657 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-10-14 23:15:41,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:41,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2019-10-14 23:15:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:41,661 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:15:41,661 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:15:41,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:15:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 23:15:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:15:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-14 23:15:41,670 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2019-10-14 23:15:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:41,670 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-14 23:15:41,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-14 23:15:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:15:41,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:41,674 INFO L380 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:41,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,875 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1433276617, now seen corresponding path program 6 times [2019-10-14 23:15:41,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:41,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562306451] [2019-10-14 23:15:41,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:42,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562306451] [2019-10-14 23:15:42,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623124971] [2019-10-14 23:15:42,074 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 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 23:15:42,105 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:15:42,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:42,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:15:42,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-10-14 23:15:42,210 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:42,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5] total 20 [2019-10-14 23:15:42,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747009036] [2019-10-14 23:15:42,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:15:42,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:15:42,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:42,214 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 20 states. [2019-10-14 23:15:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:42,332 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:15:42,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:15:42,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-10-14 23:15:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:42,336 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:15:42,336 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:15:42,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:15:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 23:15:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:15:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-14 23:15:42,353 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2019-10-14 23:15:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:42,354 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-14 23:15:42,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:15:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-14 23:15:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:15:42,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:42,358 INFO L380 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:42,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:42,563 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:42,564 INFO L82 PathProgramCache]: Analyzing trace with hash -281181829, now seen corresponding path program 7 times [2019-10-14 23:15:42,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:42,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311831868] [2019-10-14 23:15:42,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:42,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:42,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:42,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311831868] [2019-10-14 23:15:42,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216541782] [2019-10-14 23:15:42,860 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 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 23:15:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:15:42,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:42,920 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:42,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 21 [2019-10-14 23:15:42,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128936772] [2019-10-14 23:15:42,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:15:42,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:15:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:15:42,922 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 21 states. [2019-10-14 23:15:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:43,012 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-10-14 23:15:43,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:15:43,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2019-10-14 23:15:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:43,014 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:15:43,014 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:15:43,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:15:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:15:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-14 23:15:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:15:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2019-10-14 23:15:43,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 46 [2019-10-14 23:15:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:43,023 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2019-10-14 23:15:43,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:15:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2019-10-14 23:15:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 23:15:43,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:43,024 INFO L380 BasicCegarLoop]: trace histogram [22, 19, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:43,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:43,231 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash -921805841, now seen corresponding path program 8 times [2019-10-14 23:15:43,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:43,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732984486] [2019-10-14 23:15:43,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:43,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732984486] [2019-10-14 23:15:43,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029576520] [2019-10-14 23:15:43,578 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 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 23:15:43,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:43,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:43,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:15:43,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 100 proven. 380 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:43,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:43,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 25 [2019-10-14 23:15:43,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961807179] [2019-10-14 23:15:43,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:15:43,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:15:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:15:43,642 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 25 states. [2019-10-14 23:15:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:43,761 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2019-10-14 23:15:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:15:43,764 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2019-10-14 23:15:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:43,765 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:15:43,765 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:15:43,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:15:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:15:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 23:15:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:15:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2019-10-14 23:15:43,781 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2019-10-14 23:15:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:43,781 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2019-10-14 23:15:43,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:15:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2019-10-14 23:15:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:15:43,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:43,784 INFO L380 BasicCegarLoop]: trace histogram [26, 23, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:43,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:43,989 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1214743139, now seen corresponding path program 9 times [2019-10-14 23:15:43,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:43,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493998864] [2019-10-14 23:15:43,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:44,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493998864] [2019-10-14 23:15:44,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094907303] [2019-10-14 23:15:44,433 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 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 23:15:44,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:15:44,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:44,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:15:44,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 161 proven. 9 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-14 23:15:44,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:44,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 6] total 33 [2019-10-14 23:15:44,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088806909] [2019-10-14 23:15:44,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:15:44,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:44,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:15:44,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:15:44,711 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 33 states. [2019-10-14 23:15:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:44,834 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2019-10-14 23:15:44,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:15:44,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2019-10-14 23:15:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:44,836 INFO L225 Difference]: With dead ends: 86 [2019-10-14 23:15:44,836 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:15:44,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:15:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:15:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:15:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:15:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 23:15:44,845 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 62 [2019-10-14 23:15:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:44,845 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 23:15:44,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:15:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 23:15:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 23:15:44,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:44,847 INFO L380 BasicCegarLoop]: trace histogram [31, 27, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:45,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:45,059 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1553080338, now seen corresponding path program 10 times [2019-10-14 23:15:45,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:45,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747352730] [2019-10-14 23:15:45,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:45,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747352730] [2019-10-14 23:15:45,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808233361] [2019-10-14 23:15:45,628 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 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 [2019-10-14 23:15:45,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:45,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:45,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:15:45,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:15:45,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:45,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 34 [2019-10-14 23:15:45,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988943504] [2019-10-14 23:15:45,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:15:45,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:15:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:15:45,705 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 34 states. [2019-10-14 23:15:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:45,830 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2019-10-14 23:15:45,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:15:45,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2019-10-14 23:15:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:45,832 INFO L225 Difference]: With dead ends: 97 [2019-10-14 23:15:45,832 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 23:15:45,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:15:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 23:15:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-14 23:15:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:15:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 23:15:45,842 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 72 [2019-10-14 23:15:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:45,842 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 23:15:45,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:15:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 23:15:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:15:45,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:45,844 INFO L380 BasicCegarLoop]: trace histogram [36, 32, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:46,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:46,057 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1054393917, now seen corresponding path program 11 times [2019-10-14 23:15:46,058 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:46,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207172704] [2019-10-14 23:15:46,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:46,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:46,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:46,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207172704] [2019-10-14 23:15:46,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931310699] [2019-10-14 23:15:46,745 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:46,852 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-10-14 23:15:46,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:46,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 23:15:46,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:15:46,934 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:46,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35] total 39 [2019-10-14 23:15:46,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822045908] [2019-10-14 23:15:46,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:15:46,936 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:15:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:15:46,939 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 39 states. [2019-10-14 23:15:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:47,103 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2019-10-14 23:15:47,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:15:47,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2019-10-14 23:15:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:47,105 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:15:47,106 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 23:15:47,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:15:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 23:15:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-10-14 23:15:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 23:15:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-14 23:15:47,128 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 82 [2019-10-14 23:15:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:47,129 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-14 23:15:47,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:15:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-14 23:15:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 23:15:47,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:47,133 INFO L380 BasicCegarLoop]: trace histogram [41, 37, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:47,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:47,338 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1997580852, now seen corresponding path program 12 times [2019-10-14 23:15:47,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:47,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511224031] [2019-10-14 23:15:47,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:48,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511224031] [2019-10-14 23:15:48,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601268489] [2019-10-14 23:15:48,344 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:48,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:15:48,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:48,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:15:48,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 333 proven. 16 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-10-14 23:15:48,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:48,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 7] total 49 [2019-10-14 23:15:48,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991669970] [2019-10-14 23:15:48,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-14 23:15:48,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-14 23:15:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 23:15:48,581 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 49 states. [2019-10-14 23:15:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:48,785 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2019-10-14 23:15:48,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-14 23:15:48,785 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 92 [2019-10-14 23:15:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:48,786 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:15:48,786 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:15:48,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 23:15:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:15:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:15:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:15:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2019-10-14 23:15:48,797 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 92 [2019-10-14 23:15:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:48,801 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2019-10-14 23:15:48,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-14 23:15:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2019-10-14 23:15:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:15:48,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:48,803 INFO L380 BasicCegarLoop]: trace histogram [47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:49,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:49,007 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -228245216, now seen corresponding path program 13 times [2019-10-14 23:15:49,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:49,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462874737] [2019-10-14 23:15:49,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:49,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:49,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:49,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462874737] [2019-10-14 23:15:49,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521374576] [2019-10-14 23:15:49,970 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:50,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2019-10-14 23:15:50,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 387 proven. 1806 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:15:50,058 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:50,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 45] total 50 [2019-10-14 23:15:50,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629343521] [2019-10-14 23:15:50,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-14 23:15:50,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-14 23:15:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 23:15:50,061 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 50 states. [2019-10-14 23:15:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:50,314 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2019-10-14 23:15:50,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-14 23:15:50,315 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2019-10-14 23:15:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:50,316 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:15:50,316 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:15:50,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 23:15:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:15:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-10-14 23:15:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 23:15:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2019-10-14 23:15:50,325 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 104 [2019-10-14 23:15:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:50,326 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2019-10-14 23:15:50,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-14 23:15:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2019-10-14 23:15:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:15:50,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:50,328 INFO L380 BasicCegarLoop]: trace histogram [53, 48, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:50,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:50,535 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1298124850, now seen corresponding path program 14 times [2019-10-14 23:15:50,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:50,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983440694] [2019-10-14 23:15:50,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:51,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983440694] [2019-10-14 23:15:51,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441025841] [2019-10-14 23:15:51,768 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:51,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:51,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:51,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-14 23:15:51,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 2352 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:15:51,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:51,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 51] total 56 [2019-10-14 23:15:51,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397950215] [2019-10-14 23:15:51,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-14 23:15:51,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-14 23:15:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 23:15:51,862 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 56 states. [2019-10-14 23:15:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:52,100 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2019-10-14 23:15:52,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-14 23:15:52,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2019-10-14 23:15:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:52,102 INFO L225 Difference]: With dead ends: 137 [2019-10-14 23:15:52,102 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 23:15:52,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 23:15:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 23:15:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-10-14 23:15:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 23:15:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2019-10-14 23:15:52,110 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 116 [2019-10-14 23:15:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:52,111 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2019-10-14 23:15:52,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-14 23:15:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2019-10-14 23:15:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:15:52,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:52,112 INFO L380 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:52,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:52,314 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -942616568, now seen corresponding path program 15 times [2019-10-14 23:15:52,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:52,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872839702] [2019-10-14 23:15:52,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872839702] [2019-10-14 23:15:53,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907046140] [2019-10-14 23:15:53,581 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:15:53,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:53,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-10-14 23:15:53,646 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:53,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 8] total 58 [2019-10-14 23:15:53,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987777321] [2019-10-14 23:15:53,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-14 23:15:53,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-14 23:15:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-10-14 23:15:53,649 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 58 states. [2019-10-14 23:15:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,932 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2019-10-14 23:15:53,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-14 23:15:53,932 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2019-10-14 23:15:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,934 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:15:53,934 INFO L226 Difference]: Without dead ends: 124 [2019-10-14 23:15:53,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-10-14 23:15:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-14 23:15:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-10-14 23:15:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-14 23:15:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2019-10-14 23:15:53,941 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 120 [2019-10-14 23:15:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,942 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2019-10-14 23:15:53,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-14 23:15:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2019-10-14 23:15:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:15:53,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,944 INFO L380 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,147 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1486615299, now seen corresponding path program 16 times [2019-10-14 23:15:54,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701765621] [2019-10-14 23:15:54,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701765621] [2019-10-14 23:15:55,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478029695] [2019-10-14 23:15:55,677 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:55,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:55,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2019-10-14 23:15:55,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260121607] [2019-10-14 23:15:55,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-14 23:15:55,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-14 23:15:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-10-14 23:15:55,802 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 59 states. [2019-10-14 23:15:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,069 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-10-14 23:15:56,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-14 23:15:56,069 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2019-10-14 23:15:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,070 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:15:56,070 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 23:15:56,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-10-14 23:15:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 23:15:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-10-14 23:15:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:15:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2019-10-14 23:15:56,077 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 122 [2019-10-14 23:15:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,077 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2019-10-14 23:15:56,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-14 23:15:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2019-10-14 23:15:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:15:56,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,079 INFO L380 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,283 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash -483769538, now seen corresponding path program 17 times [2019-10-14 23:15:56,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566722338] [2019-10-14 23:15:56,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566722338] [2019-10-14 23:15:57,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508199684] [2019-10-14 23:15:57,587 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2019-10-14 23:15:57,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 784 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2019-10-14 23:15:58,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:58,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 31] total 81 [2019-10-14 23:15:58,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276318194] [2019-10-14 23:15:58,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-10-14 23:15:58,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-10-14 23:15:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-10-14 23:15:58,700 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 81 states. [2019-10-14 23:15:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,100 INFO L93 Difference]: Finished difference Result 175 states and 226 transitions. [2019-10-14 23:15:59,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-10-14 23:15:59,100 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 124 [2019-10-14 23:15:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,102 INFO L225 Difference]: With dead ends: 175 [2019-10-14 23:15:59,102 INFO L226 Difference]: Without dead ends: 170 [2019-10-14 23:15:59,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-10-14 23:15:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-14 23:15:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-14 23:15:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-14 23:15:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2019-10-14 23:15:59,111 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 124 [2019-10-14 23:15:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,112 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2019-10-14 23:15:59,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-10-14 23:15:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2019-10-14 23:15:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:15:59,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,113 INFO L380 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,317 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 529031312, now seen corresponding path program 18 times [2019-10-14 23:15:59,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151489428] [2019-10-14 23:15:59,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:01,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151489428] [2019-10-14 23:16:01,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011951935] [2019-10-14 23:16:01,678 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2019-10-14 23:16:01,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2019-10-14 23:16:02,419 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:02,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 42] total 92 [2019-10-14 23:16:02,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563017239] [2019-10-14 23:16:02,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-10-14 23:16:02,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:02,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-10-14 23:16:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-10-14 23:16:02,423 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand 92 states. [2019-10-14 23:16:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:03,139 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2019-10-14 23:16:03,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-10-14 23:16:03,140 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 168 [2019-10-14 23:16:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:03,141 INFO L225 Difference]: With dead ends: 197 [2019-10-14 23:16:03,141 INFO L226 Difference]: Without dead ends: 192 [2019-10-14 23:16:03,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-10-14 23:16:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-14 23:16:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2019-10-14 23:16:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-10-14 23:16:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2019-10-14 23:16:03,148 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 168 [2019-10-14 23:16:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:03,148 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2019-10-14 23:16:03,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-10-14 23:16:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2019-10-14 23:16:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 23:16:03,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:03,149 INFO L380 BasicCegarLoop]: trace histogram [90, 50, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,350 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 979727385, now seen corresponding path program 19 times [2019-10-14 23:16:03,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776122657] [2019-10-14 23:16:03,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776122657] [2019-10-14 23:16:06,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269795371] [2019-10-14 23:16:06,331 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:06,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 92 conjunts are in the unsatisfiable core [2019-10-14 23:16:06,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:06,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2019-10-14 23:16:06,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887942989] [2019-10-14 23:16:06,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-10-14 23:16:06,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:06,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-10-14 23:16:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-10-14 23:16:06,496 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand 93 states. [2019-10-14 23:16:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:07,120 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2019-10-14 23:16:07,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-10-14 23:16:07,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 190 [2019-10-14 23:16:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:07,123 INFO L225 Difference]: With dead ends: 199 [2019-10-14 23:16:07,123 INFO L226 Difference]: Without dead ends: 194 [2019-10-14 23:16:07,124 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-10-14 23:16:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-14 23:16:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-10-14 23:16:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-10-14 23:16:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2019-10-14 23:16:07,130 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 190 [2019-10-14 23:16:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:07,131 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2019-10-14 23:16:07,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-10-14 23:16:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2019-10-14 23:16:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 23:16:07,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,132 INFO L380 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,336 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2023216852, now seen corresponding path program 20 times [2019-10-14 23:16:07,337 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996831772] [2019-10-14 23:16:07,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:10,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996831772] [2019-10-14 23:16:10,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523700483] [2019-10-14 23:16:10,901 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:11,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 93 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:11,060 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:11,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2019-10-14 23:16:11,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980683004] [2019-10-14 23:16:11,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-10-14 23:16:11,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-10-14 23:16:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-10-14 23:16:11,063 INFO L87 Difference]: Start difference. First operand 193 states and 234 transitions. Second operand 94 states. [2019-10-14 23:16:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,754 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2019-10-14 23:16:11,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-10-14 23:16:11,758 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 192 [2019-10-14 23:16:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,760 INFO L225 Difference]: With dead ends: 201 [2019-10-14 23:16:11,760 INFO L226 Difference]: Without dead ends: 196 [2019-10-14 23:16:11,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-10-14 23:16:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-10-14 23:16:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2019-10-14 23:16:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-10-14 23:16:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2019-10-14 23:16:11,768 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 192 [2019-10-14 23:16:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,768 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2019-10-14 23:16:11,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-10-14 23:16:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2019-10-14 23:16:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 23:16:11,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,770 INFO L380 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,973 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,974 INFO L82 PathProgramCache]: Analyzing trace with hash -205752625, now seen corresponding path program 21 times [2019-10-14 23:16:11,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010541007] [2019-10-14 23:16:11,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:15,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010541007] [2019-10-14 23:16:15,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953900947] [2019-10-14 23:16:15,110 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 86 check-sat command(s) [2019-10-14 23:16:15,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:15,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-14 23:16:15,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 4250 proven. 1764 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-10-14 23:16:15,341 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:15,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 45] total 95 [2019-10-14 23:16:15,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032988040] [2019-10-14 23:16:15,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-10-14 23:16:15,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-10-14 23:16:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-10-14 23:16:15,344 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand 95 states. [2019-10-14 23:16:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,095 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2019-10-14 23:16:16,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-10-14 23:16:16,095 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 194 [2019-10-14 23:16:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,096 INFO L225 Difference]: With dead ends: 203 [2019-10-14 23:16:16,096 INFO L226 Difference]: Without dead ends: 198 [2019-10-14 23:16:16,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-10-14 23:16:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-10-14 23:16:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-10-14 23:16:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-10-14 23:16:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 240 transitions. [2019-10-14 23:16:16,104 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 240 transitions. Word has length 194 [2019-10-14 23:16:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,104 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 240 transitions. [2019-10-14 23:16:16,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-10-14 23:16:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 240 transitions. [2019-10-14 23:16:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 23:16:16,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,106 INFO L380 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,310 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,311 INFO L82 PathProgramCache]: Analyzing trace with hash 943260682, now seen corresponding path program 22 times [2019-10-14 23:16:16,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136112085] [2019-10-14 23:16:16,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136112085] [2019-10-14 23:16:19,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466765184] [2019-10-14 23:16:19,464 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:19,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:19,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-14 23:16:19,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:19,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2019-10-14 23:16:19,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131290689] [2019-10-14 23:16:19,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-10-14 23:16:19,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-10-14 23:16:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-10-14 23:16:19,627 INFO L87 Difference]: Start difference. First operand 197 states and 240 transitions. Second operand 96 states. [2019-10-14 23:16:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:20,401 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2019-10-14 23:16:20,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-10-14 23:16:20,402 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 196 [2019-10-14 23:16:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:20,403 INFO L225 Difference]: With dead ends: 205 [2019-10-14 23:16:20,403 INFO L226 Difference]: Without dead ends: 200 [2019-10-14 23:16:20,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-10-14 23:16:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-10-14 23:16:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-10-14 23:16:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-14 23:16:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 243 transitions. [2019-10-14 23:16:20,410 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 243 transitions. Word has length 196 [2019-10-14 23:16:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:20,411 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 243 transitions. [2019-10-14 23:16:20,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-10-14 23:16:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 243 transitions. [2019-10-14 23:16:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 23:16:20,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:20,412 INFO L380 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:20,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,616 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1338453637, now seen corresponding path program 23 times [2019-10-14 23:16:20,617 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:20,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999648358] [2019-10-14 23:16:20,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat