java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:42,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:42,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:42,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:42,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:42,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:42,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:42,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:42,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:42,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:42,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:42,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:42,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:42,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:42,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:42,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:42,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:42,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:42,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:42,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:42,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:42,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:42,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:42,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:42,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:42:42,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:42:42,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:42:42,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:42:42,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:42:42,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:42:42,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:42,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:42,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:42,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:42,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:42,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:42,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:42,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:42,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:42,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:42,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:42,961 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 17:42:42,975 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:42,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:42,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:42,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:42,976 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:42,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:42,977 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:42,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:42,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:42,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:42,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:42,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:42,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:42,978 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:42,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:42,979 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:42,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:42,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:42,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:42,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:42,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:42,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:42,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:42,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:42,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:42,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:42,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:42,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:42,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:43,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:43,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:43,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:43,284 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:43,284 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:43,285 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-13 17:42:43,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b801dc/2b3d37f3b8f047a597522a7df1868d10/FLAG8b10efc51 [2019-10-13 17:42:43,769 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:43,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2019-10-13 17:42:43,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b801dc/2b3d37f3b8f047a597522a7df1868d10/FLAG8b10efc51 [2019-10-13 17:42:44,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b801dc/2b3d37f3b8f047a597522a7df1868d10 [2019-10-13 17:42:44,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:44,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:44,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:44,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:44,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:44,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ba2c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44, skipping insertion in model container [2019-10-13 17:42:44,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,213 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:44,237 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:44,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:44,477 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:44,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:44,625 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:44,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44 WrapperNode [2019-10-13 17:42:44,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:44,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:44,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:44,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:44,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (1/1) ... [2019-10-13 17:42:44,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:44,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:44,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:44,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:44,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (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 17:42:44,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:44,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:44,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:44,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:45,064 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:45,064 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-13 17:42:45,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:45 BoogieIcfgContainer [2019-10-13 17:42:45,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:45,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:45,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:45,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:45,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:44" (1/3) ... [2019-10-13 17:42:45,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6592c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:45, skipping insertion in model container [2019-10-13 17:42:45,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:44" (2/3) ... [2019-10-13 17:42:45,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6592c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:45, skipping insertion in model container [2019-10-13 17:42:45,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:45" (3/3) ... [2019-10-13 17:42:45,092 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2019-10-13 17:42:45,101 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:45,109 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:45,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:45,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:45,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:45,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:45,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:45,153 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:45,153 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:45,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:45,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-13 17:42:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:42:45,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,175 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,176 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash -340082088, now seen corresponding path program 1 times [2019-10-13 17:42:45,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171413191] [2019-10-13 17:42:45,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,365 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 17:42:45,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171413191] [2019-10-13 17:42:45,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:45,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:45,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883278961] [2019-10-13 17:42:45,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:45,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:45,389 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-13 17:42:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,513 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2019-10-13 17:42:45,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:45,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-13 17:42:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,524 INFO L225 Difference]: With dead ends: 69 [2019-10-13 17:42:45,524 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 17:42:45,527 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 17:42:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 17:42:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-13 17:42:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:42:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-13 17:42:45,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-10-13 17:42:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,569 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-13 17:42:45,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-13 17:42:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:42:45,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,571 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,571 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1435036102, now seen corresponding path program 1 times [2019-10-13 17:42:45,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712098948] [2019-10-13 17:42:45,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,738 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 17:42:45,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712098948] [2019-10-13 17:42:45,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:45,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:45,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296308227] [2019-10-13 17:42:45,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:45,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:45,744 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-10-13 17:42:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,908 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-10-13 17:42:45,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:45,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-13 17:42:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,911 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:42:45,911 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 17:42:45,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 17:42:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 17:42:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:42:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-13 17:42:45,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2019-10-13 17:42:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,923 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-13 17:42:45,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-13 17:42:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:42:45,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,924 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,925 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1431897668, now seen corresponding path program 1 times [2019-10-13 17:42:45,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269802259] [2019-10-13 17:42:45,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:46,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269802259] [2019-10-13 17:42:46,026 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:46,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:46,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368773343] [2019-10-13 17:42:46,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:46,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:46,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:46,029 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2019-10-13 17:42:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,144 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-13 17:42:46,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:46,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-13 17:42:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,146 INFO L225 Difference]: With dead ends: 79 [2019-10-13 17:42:46,146 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 17:42:46,147 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 17:42:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 17:42:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-13 17:42:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:42:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-10-13 17:42:46,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2019-10-13 17:42:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,155 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-10-13 17:42:46,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-10-13 17:42:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:42:46,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,156 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,157 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash -820794174, now seen corresponding path program 1 times [2019-10-13 17:42:46,158 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697034600] [2019-10-13 17:42:46,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:46,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697034600] [2019-10-13 17:42:46,240 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:46,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:46,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771107252] [2019-10-13 17:42:46,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:46,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:46,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:46,244 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-10-13 17:42:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,394 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2019-10-13 17:42:46,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:46,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-13 17:42:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,395 INFO L225 Difference]: With dead ends: 75 [2019-10-13 17:42:46,396 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:42:46,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:42:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2019-10-13 17:42:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:42:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-13 17:42:46,403 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2019-10-13 17:42:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,404 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-13 17:42:46,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-13 17:42:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:42:46,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,405 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -304137992, now seen corresponding path program 1 times [2019-10-13 17:42:46,406 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550626908] [2019-10-13 17:42:46,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:42:46,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550626908] [2019-10-13 17:42:46,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125608956] [2019-10-13 17:42:46,518 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 17:42:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:46,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:42:46,638 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:46,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:46,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006367790] [2019-10-13 17:42:46,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:46,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:46,642 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2019-10-13 17:42:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,770 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 17:42:46,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:46,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-13 17:42:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,771 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:42:46,771 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:42:46,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:42:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:42:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:42:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-13 17:42:46,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2019-10-13 17:42:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,789 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-13 17:42:46,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-13 17:42:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:42:46,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,791 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:46,992 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -78769546, now seen corresponding path program 2 times [2019-10-13 17:42:46,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938762730] [2019-10-13 17:42:46,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:42:47,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938762730] [2019-10-13 17:42:47,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957180274] [2019-10-13 17:42:47,118 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:47,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:47,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:47,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:47,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:42:47,214 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:47,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:47,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121046763] [2019-10-13 17:42:47,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:47,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:47,216 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2019-10-13 17:42:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:47,435 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-10-13 17:42:47,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:47,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-10-13 17:42:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:47,436 INFO L225 Difference]: With dead ends: 85 [2019-10-13 17:42:47,436 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:42:47,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:42:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2019-10-13 17:42:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:42:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-10-13 17:42:47,454 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2019-10-13 17:42:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:47,455 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-10-13 17:42:47,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-10-13 17:42:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:42:47,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:47,457 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:47,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:47,658 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 805210282, now seen corresponding path program 3 times [2019-10-13 17:42:47,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:47,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025981227] [2019-10-13 17:42:47,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:49,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025981227] [2019-10-13 17:42:49,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191632505] [2019-10-13 17:42:49,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:49,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:49,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:49,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 70 conjunts are in the unsatisfiable core [2019-10-13 17:42:49,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:52,977 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:52,978 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 17 treesize of output 18 [2019-10-13 17:42:52,979 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-13 17:42:53,014 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:53,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:53,020 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:42:53,021 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-10-13 17:42:53,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:53,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:53,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:53,414 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:53,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38] total 67 [2019-10-13 17:42:53,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751329222] [2019-10-13 17:42:53,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-13 17:42:53,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-13 17:42:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2019-10-13 17:42:53,418 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 67 states. [2019-10-13 17:42:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:59,904 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2019-10-13 17:42:59,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-13 17:42:59,905 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 52 [2019-10-13 17:42:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:59,907 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:42:59,907 INFO L226 Difference]: Without dead ends: 130 [2019-10-13 17:42:59,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=433, Invalid=8879, Unknown=0, NotChecked=0, Total=9312 [2019-10-13 17:42:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-13 17:42:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2019-10-13 17:42:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:42:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-10-13 17:42:59,925 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2019-10-13 17:42:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:59,925 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-10-13 17:42:59,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-13 17:42:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-10-13 17:42:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:42:59,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:59,927 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:00,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:00,129 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1759673384, now seen corresponding path program 4 times [2019-10-13 17:43:00,130 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:00,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739641530] [2019-10-13 17:43:00,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:43:00,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739641530] [2019-10-13 17:43:00,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74847172] [2019-10-13 17:43:00,222 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:00,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:00,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:00,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:00,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 17:43:00,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:00,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:43:00,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850790751] [2019-10-13 17:43:00,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:00,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:00,359 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2019-10-13 17:43:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:00,692 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2019-10-13 17:43:00,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:43:00,692 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-10-13 17:43:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:00,695 INFO L225 Difference]: With dead ends: 181 [2019-10-13 17:43:00,695 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:43:00,696 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:43:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-10-13 17:43:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:43:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-10-13 17:43:00,710 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2019-10-13 17:43:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:00,710 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-10-13 17:43:00,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-10-13 17:43:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:43:00,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:00,712 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:00,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:00,930 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 41163494, now seen corresponding path program 5 times [2019-10-13 17:43:00,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:00,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487010955] [2019-10-13 17:43:00,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:00,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:01,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487010955] [2019-10-13 17:43:01,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579208890] [2019-10-13 17:43:01,008 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:01,094 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:43:01,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:01,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:01,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:01,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:01,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:43:01,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403769025] [2019-10-13 17:43:01,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:01,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:01,164 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 14 states. [2019-10-13 17:43:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:01,544 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-10-13 17:43:01,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:01,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-10-13 17:43:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:01,545 INFO L225 Difference]: With dead ends: 102 [2019-10-13 17:43:01,545 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 17:43:01,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 17:43:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-10-13 17:43:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:43:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-10-13 17:43:01,554 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2019-10-13 17:43:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:01,554 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-10-13 17:43:01,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-10-13 17:43:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:43:01,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:01,556 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:01,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:01,766 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 351008988, now seen corresponding path program 6 times [2019-10-13 17:43:01,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:01,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929701752] [2019-10-13 17:43:01,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:01,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:01,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:02,960 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:43:03,140 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:43:03,909 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-13 17:43:04,107 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-10-13 17:43:04,962 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-13 17:43:05,131 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2019-10-13 17:43:05,300 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-13 17:43:05,910 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-13 17:43:06,152 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-10-13 17:43:06,366 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-10-13 17:43:06,570 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-10-13 17:43:06,810 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-13 17:43:07,608 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2019-10-13 17:43:07,846 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-10-13 17:43:08,050 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-10-13 17:43:08,274 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2019-10-13 17:43:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:09,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929701752] [2019-10-13 17:43:09,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797017200] [2019-10-13 17:43:09,787 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:09,851 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:43:09,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:09,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2019-10-13 17:43:09,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:13,540 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:13,542 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:13,543 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:13,547 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:13,547 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 23 [2019-10-13 17:43:13,548 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:13,551 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:13,552 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 17:43:13,552 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:3 [2019-10-13 17:43:13,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:13,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:13,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47] total 104 [2019-10-13 17:43:13,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101332129] [2019-10-13 17:43:13,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-10-13 17:43:13,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-10-13 17:43:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=10019, Unknown=0, NotChecked=0, Total=10712 [2019-10-13 17:43:13,766 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 104 states. [2019-10-13 17:43:16,287 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 32 [2019-10-13 17:43:16,798 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 36 [2019-10-13 17:43:17,314 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2019-10-13 17:43:17,667 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 33 [2019-10-13 17:43:17,990 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 35 [2019-10-13 17:43:18,296 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2019-10-13 17:43:19,619 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2019-10-13 17:43:20,901 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2019-10-13 17:43:21,207 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2019-10-13 17:43:23,763 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2019-10-13 17:43:24,122 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2019-10-13 17:43:24,389 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-10-13 17:43:24,669 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 40 [2019-10-13 17:43:26,166 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2019-10-13 17:43:27,740 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 37 [2019-10-13 17:43:28,282 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 39 [2019-10-13 17:43:29,524 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 34