java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:24,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:24,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:24,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:24,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:24,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:24,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:24,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:24,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:24,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:24,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:24,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:24,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:24,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:24,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:24,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:24,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:24,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:24,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:24,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:24,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:24,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:24,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:24,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:24,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:15:24,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:15:24,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:15:24,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:15:24,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:15:24,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:15:24,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:15:24,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:15:24,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:15:24,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:15:24,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:15:24,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:15:24,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:15:24,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:15:24,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:24,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:24,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:24,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:15:24,985 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:24,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:24,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:24,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:24,987 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:24,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:24,987 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:24,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:24,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:24,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:24,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:24,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:24,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:24,989 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:24,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:24,989 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:24,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:24,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:24,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:24,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:24,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:24,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:24,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:24,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:24,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:24,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:24,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:24,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:24,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:25,264 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:25,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:25,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:25,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:25,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:25,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-13 19:15:25,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/290f3696a/24a4054b37d1475f8d3625e5f8e32391/FLAG39d44fadb [2019-10-13 19:15:25,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:25,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-13 19:15:25,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/290f3696a/24a4054b37d1475f8d3625e5f8e32391/FLAG39d44fadb [2019-10-13 19:15:26,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/290f3696a/24a4054b37d1475f8d3625e5f8e32391 [2019-10-13 19:15:26,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:26,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:26,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:26,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:26,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:26,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616dfd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26, skipping insertion in model container [2019-10-13 19:15:26,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,188 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:26,203 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:26,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:26,350 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:26,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:26,389 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:26,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26 WrapperNode [2019-10-13 19:15:26,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:26,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:26,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:26,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:26,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... [2019-10-13 19:15:26,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:26,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:26,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:26,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:26,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:15:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:28,858 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:28,858 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:15:28,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28 BoogieIcfgContainer [2019-10-13 19:15:28,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:28,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:28,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:28,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:28,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:26" (1/3) ... [2019-10-13 19:15:28,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad9fc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2019-10-13 19:15:28,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26" (2/3) ... [2019-10-13 19:15:28,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad9fc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2019-10-13 19:15:28,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28" (3/3) ... [2019-10-13 19:15:28,890 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2019-10-13 19:15:28,906 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:28,920 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:28,932 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:28,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:28,969 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:28,969 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:28,969 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:28,969 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:28,970 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:28,970 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:28,970 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-13 19:15:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:29,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,005 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,010 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -956066777, now seen corresponding path program 1 times [2019-10-13 19:15:29,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008916463] [2019-10-13 19:15:29,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:29,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008916463] [2019-10-13 19:15:29,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:29,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:15:29,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936719176] [2019-10-13 19:15:29,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:15:29,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:15:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:29,215 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-13 19:15:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:31,373 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-10-13 19:15:31,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:15:31,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 19:15:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:31,387 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:15:31,387 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:15:31,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:15:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:15:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:15:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-13 19:15:31,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-10-13 19:15:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:31,433 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-13 19:15:31,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:15:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-13 19:15:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:31,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:31,435 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:31,436 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1471973101, now seen corresponding path program 1 times [2019-10-13 19:15:31,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:31,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130028412] [2019-10-13 19:15:31,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:31,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130028412] [2019-10-13 19:15:31,558 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:31,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:15:31,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747160586] [2019-10-13 19:15:31,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:15:31,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:15:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:31,562 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-10-13 19:15:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:31,675 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-13 19:15:31,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:31,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 19:15:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:31,677 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:15:31,677 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:15:31,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:15:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2019-10-13 19:15:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:15:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 19:15:31,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2019-10-13 19:15:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:31,697 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 19:15:31,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:15:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 19:15:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:15:31,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:31,698 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:31,699 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash 534952077, now seen corresponding path program 1 times [2019-10-13 19:15:31,700 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:31,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575654049] [2019-10-13 19:15:31,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:31,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575654049] [2019-10-13 19:15:31,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187933894] [2019-10-13 19:15:31,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:15:31,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:32,039 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 19:15:32,040 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,043 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:32,044 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,044 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-13 19:15:32,099 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 19:15:32,100 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,108 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:32,109 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,109 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-13 19:15:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:32,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:32,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2019-10-13 19:15:32,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515547087] [2019-10-13 19:15:32,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:15:32,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:15:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:32,150 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2019-10-13 19:15:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:32,418 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2019-10-13 19:15:32,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:32,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-13 19:15:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:32,420 INFO L225 Difference]: With dead ends: 56 [2019-10-13 19:15:32,420 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:15:32,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:15:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-13 19:15:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 19:15:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 19:15:32,430 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2019-10-13 19:15:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:32,431 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 19:15:32,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:15:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 19:15:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:15:32,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:32,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:32,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:32,634 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 909633835, now seen corresponding path program 1 times [2019-10-13 19:15:32,636 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:32,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644956926] [2019-10-13 19:15:32,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:32,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644956926] [2019-10-13 19:15:32,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092489106] [2019-10-13 19:15:32,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 19:15:32,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:32,914 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 19:15:32,915 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,979 INFO L567 ElimStorePlain]: treesize reduction 196, result has 11.7 percent of original size [2019-10-13 19:15:32,983 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-10-13 19:15:32,984 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:32,994 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:32,995 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-13 19:15:32,995 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-10-13 19:15:32,997 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:32,998 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-10-13 19:15:33,323 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:33,324 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2019-10-13 19:15:33,325 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-13 19:15:33,343 INFO L567 ElimStorePlain]: treesize reduction 13, result has 48.0 percent of original size [2019-10-13 19:15:33,344 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:15:33,344 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:12 [2019-10-13 19:15:33,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:33,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:33,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 15 [2019-10-13 19:15:33,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673439215] [2019-10-13 19:15:33,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:15:33,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:15:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:33,442 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 15 states. [2019-10-13 19:15:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:36,473 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-13 19:15:36,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:15:36,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-10-13 19:15:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:36,479 INFO L225 Difference]: With dead ends: 110 [2019-10-13 19:15:36,479 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 19:15:36,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:15:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 19:15:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2019-10-13 19:15:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 19:15:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-10-13 19:15:36,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 27 [2019-10-13 19:15:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:36,510 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-10-13 19:15:36,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:15:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-10-13 19:15:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:15:36,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:36,514 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:36,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:36,719 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -180676761, now seen corresponding path program 2 times [2019-10-13 19:15:36,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:36,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795934570] [2019-10-13 19:15:36,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:36,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:36,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:36,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795934570] [2019-10-13 19:15:36,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713684740] [2019-10-13 19:15:36,889 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:36,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:36,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:36,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:15:36,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:36,983 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:36,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 19:15:36,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992238403] [2019-10-13 19:15:36,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:15:36,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:15:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:36,985 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 9 states. [2019-10-13 19:15:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:37,254 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2019-10-13 19:15:37,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:15:37,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-10-13 19:15:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:37,257 INFO L225 Difference]: With dead ends: 107 [2019-10-13 19:15:37,257 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 19:15:37,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 19:15:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-10-13 19:15:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 19:15:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-10-13 19:15:37,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2019-10-13 19:15:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:37,271 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-10-13 19:15:37,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:15:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-10-13 19:15:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 19:15:37,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:37,272 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:37,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:37,473 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:37,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1198313659, now seen corresponding path program 3 times [2019-10-13 19:15:37,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:37,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067307818] [2019-10-13 19:15:37,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:37,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:37,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:37,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067307818] [2019-10-13 19:15:37,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392937406] [2019-10-13 19:15:37,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:37,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:15:37,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:37,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:15:37,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:37,818 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:37,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 19:15:37,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125294695] [2019-10-13 19:15:37,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:15:37,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:15:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:37,820 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 10 states. [2019-10-13 19:15:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:38,151 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2019-10-13 19:15:38,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:15:38,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-10-13 19:15:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:38,153 INFO L225 Difference]: With dead ends: 108 [2019-10-13 19:15:38,153 INFO L226 Difference]: Without dead ends: 68 [2019-10-13 19:15:38,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-13 19:15:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-10-13 19:15:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 19:15:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-10-13 19:15:38,165 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2019-10-13 19:15:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:38,166 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-10-13 19:15:38,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:15:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-10-13 19:15:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:15:38,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:38,167 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:38,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:38,379 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:38,379 INFO L82 PathProgramCache]: Analyzing trace with hash 105170851, now seen corresponding path program 4 times [2019-10-13 19:15:38,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:38,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707390659] [2019-10-13 19:15:38,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:38,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:38,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:38,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707390659] [2019-10-13 19:15:38,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914702222] [2019-10-13 19:15:38,559 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:38,609 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:38,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:38,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:15:38,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:38,660 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:38,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 19:15:38,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409299735] [2019-10-13 19:15:38,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:15:38,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:15:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:15:38,663 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 11 states. [2019-10-13 19:15:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:39,029 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-10-13 19:15:39,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:39,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-13 19:15:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:39,030 INFO L225 Difference]: With dead ends: 120 [2019-10-13 19:15:39,030 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 19:15:39,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:15:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 19:15:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2019-10-13 19:15:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 19:15:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-10-13 19:15:39,043 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 35 [2019-10-13 19:15:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:39,043 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-10-13 19:15:39,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:15:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-10-13 19:15:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:15:39,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:39,045 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:39,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:39,249 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1376665471, now seen corresponding path program 5 times [2019-10-13 19:15:39,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:39,250 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767428696] [2019-10-13 19:15:39,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:39,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767428696] [2019-10-13 19:15:39,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169988653] [2019-10-13 19:15:39,421 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 [2019-10-13 19:15:41,187 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-13 19:15:41,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:41,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:15:41,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:41,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:41,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 19:15:41,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721991155] [2019-10-13 19:15:41,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:15:41,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:15:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:15:41,229 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 12 states. [2019-10-13 19:15:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:41,710 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2019-10-13 19:15:41,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:15:41,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-13 19:15:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:41,711 INFO L225 Difference]: With dead ends: 132 [2019-10-13 19:15:41,712 INFO L226 Difference]: Without dead ends: 82 [2019-10-13 19:15:41,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:15:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-13 19:15:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-10-13 19:15:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-13 19:15:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-10-13 19:15:41,742 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2019-10-13 19:15:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:41,744 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-10-13 19:15:41,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:15:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-10-13 19:15:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:15:41,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:41,746 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:41,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:41,963 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 507771359, now seen corresponding path program 6 times [2019-10-13 19:15:41,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:41,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214585077] [2019-10-13 19:15:41,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:41,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:41,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:42,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214585077] [2019-10-13 19:15:42,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090293592] [2019-10-13 19:15:42,188 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 [2019-10-13 19:15:43,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 19:15:43,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:43,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:15:43,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:43,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:43,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 19:15:43,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109509661] [2019-10-13 19:15:43,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:15:43,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:15:43,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:15:43,378 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 13 states. [2019-10-13 19:15:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:43,932 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2019-10-13 19:15:43,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:15:43,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-10-13 19:15:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:43,934 INFO L225 Difference]: With dead ends: 144 [2019-10-13 19:15:43,934 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 19:15:43,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:15:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 19:15:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2019-10-13 19:15:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-13 19:15:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-13 19:15:43,947 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 39 [2019-10-13 19:15:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:43,947 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-13 19:15:43,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:15:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-13 19:15:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:15:43,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:43,948 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:44,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:44,154 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1024633923, now seen corresponding path program 7 times [2019-10-13 19:15:44,155 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:44,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589091933] [2019-10-13 19:15:44,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:44,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:44,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:44,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589091933] [2019-10-13 19:15:44,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035771972] [2019-10-13 19:15:44,344 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 [2019-10-13 19:15:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:44,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:15:44,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:44,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:44,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 19:15:44,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644155828] [2019-10-13 19:15:44,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:15:44,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:15:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:44,453 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 14 states. [2019-10-13 19:15:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:45,064 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2019-10-13 19:15:45,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:15:45,064 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-10-13 19:15:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:45,066 INFO L225 Difference]: With dead ends: 156 [2019-10-13 19:15:45,066 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 19:15:45,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 19:15:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-10-13 19:15:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-13 19:15:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2019-10-13 19:15:45,078 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 41 [2019-10-13 19:15:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:45,078 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2019-10-13 19:15:45,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:15:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2019-10-13 19:15:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:15:45,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:45,079 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:45,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:45,287 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -492327397, now seen corresponding path program 8 times [2019-10-13 19:15:45,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:45,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97136199] [2019-10-13 19:15:45,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:45,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:45,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:45,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97136199] [2019-10-13 19:15:45,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310514968] [2019-10-13 19:15:45,512 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 [2019-10-13 19:15:45,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:45,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:45,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:15:45,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:15:45,609 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:45,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 19:15:45,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105989645] [2019-10-13 19:15:45,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:15:45,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:15:45,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:45,611 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2019-10-13 19:15:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:46,303 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2019-10-13 19:15:46,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:15:46,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-10-13 19:15:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:46,304 INFO L225 Difference]: With dead ends: 168 [2019-10-13 19:15:46,305 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 19:15:46,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 19:15:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2019-10-13 19:15:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 19:15:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2019-10-13 19:15:46,322 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 43 [2019-10-13 19:15:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:46,323 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2019-10-13 19:15:46,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:15:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2019-10-13 19:15:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:15:46,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:46,324 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:46,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:46,534 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -46864135, now seen corresponding path program 9 times [2019-10-13 19:15:46,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:46,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851019000] [2019-10-13 19:15:46,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:46,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:46,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:15:46,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851019000] [2019-10-13 19:15:46,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97524903] [2019-10-13 19:15:46,754 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