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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:02:44,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:02:44,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:02:44,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:02:44,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:02:44,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:02:44,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:02:44,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:02:44,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:02:44,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:02:44,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:02:44,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:02:44,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:02:44,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:02:44,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:02:44,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:02:44,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:02:44,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:02:44,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:02:44,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:02:44,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:02:44,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:02:44,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:02:44,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:02:44,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:02:44,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:02:44,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:02:44,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:02:44,625 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 [2019-10-15 03:02:44,652 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:02:44,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:02:44,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:02:44,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:02:44,654 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:02:44,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:02:44,655 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:02:44,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:02:44,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:02:44,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:02:44,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:02:44,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:02:44,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:02:44,656 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:02:44,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:02:44,657 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:02:44,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:02:44,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:02:44,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:02:44,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:02:44,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:02:44,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:02:44,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:02:44,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:02:44,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:02:44,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:02:44,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:02:44,986 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:02:44,986 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:02:44,987 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-15 03:02:45,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324cb337a/0d2f08ece327425cb3bc0bb77303b831/FLAG2a8ba62b4 [2019-10-15 03:02:45,549 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:02:45,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-15 03:02:45,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324cb337a/0d2f08ece327425cb3bc0bb77303b831/FLAG2a8ba62b4 [2019-10-15 03:02:45,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324cb337a/0d2f08ece327425cb3bc0bb77303b831 [2019-10-15 03:02:45,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:02:45,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:02:45,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:45,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:02:45,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:02:45,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:45" (1/1) ... [2019-10-15 03:02:45,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfa0c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:45, skipping insertion in model container [2019-10-15 03:02:45,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:45" (1/1) ... [2019-10-15 03:02:45,942 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:02:45,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:02:46,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:46,192 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:02:46,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:46,239 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:02:46,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46 WrapperNode [2019-10-15 03:02:46,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:46,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:02:46,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:02:46,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:02:46,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (1/1) ... [2019-10-15 03:02:46,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:02:46,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:02:46,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:02:46,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:02:46,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (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 [2019-10-15 03:02:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:02:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:02:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:02:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:02:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:02:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:02:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:02:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:02:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:02:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:02:47,007 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:02:47,007 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-15 03:02:47,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:47 BoogieIcfgContainer [2019-10-15 03:02:47,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:02:47,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:02:47,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:02:47,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:02:47,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:02:45" (1/3) ... [2019-10-15 03:02:47,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53400708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:47, skipping insertion in model container [2019-10-15 03:02:47,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:46" (2/3) ... [2019-10-15 03:02:47,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53400708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:47, skipping insertion in model container [2019-10-15 03:02:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:47" (3/3) ... [2019-10-15 03:02:47,018 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-10-15 03:02:47,030 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:02:47,055 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:02:47,068 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:02:47,096 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:02:47,096 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:02:47,096 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:02:47,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:02:47,097 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:02:47,097 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:02:47,097 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:02:47,098 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:02:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 03:02:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 03:02:47,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:47,124 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:47,126 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1133679609, now seen corresponding path program 1 times [2019-10-15 03:02:47,139 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:47,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45828176] [2019-10-15 03:02:47,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:47,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:47,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:47,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45828176] [2019-10-15 03:02:47,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:02:47,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-15 03:02:47,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470128352] [2019-10-15 03:02:47,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 03:02:47,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 03:02:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:02:47,727 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 12 states. [2019-10-15 03:02:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:47,847 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2019-10-15 03:02:47,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 03:02:47,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-10-15 03:02:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:47,857 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:02:47,857 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 03:02:47,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:02:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 03:02:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 03:02:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 03:02:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-15 03:02:47,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-15 03:02:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:47,900 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-15 03:02:47,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 03:02:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-15 03:02:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:02:47,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:47,902 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:47,902 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 786024767, now seen corresponding path program 1 times [2019-10-15 03:02:47,903 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:47,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952893841] [2019-10-15 03:02:47,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:47,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:47,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:48,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952893841] [2019-10-15 03:02:48,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176267985] [2019-10-15 03:02:48,266 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 [2019-10-15 03:02:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:48,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:02:48,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:48,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:48,661 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:48,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:48,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:49,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:49,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:49,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589445786] [2019-10-15 03:02:49,136 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:02:49,137 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:49,165 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:49,184 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:49,186 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:49,289 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 10 for LOIs [2019-10-15 03:02:49,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-15 03:02:49,717 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:50,661 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:50,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 15] total 39 [2019-10-15 03:02:50,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616168979] [2019-10-15 03:02:50,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 03:02:50,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 03:02:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:02:50,668 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 39 states. [2019-10-15 03:02:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:52,432 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-10-15 03:02:52,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 03:02:52,433 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 18 [2019-10-15 03:02:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:52,436 INFO L225 Difference]: With dead ends: 34 [2019-10-15 03:02:52,436 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 03:02:52,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1026, Invalid=3134, Unknown=0, NotChecked=0, Total=4160 [2019-10-15 03:02:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 03:02:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-15 03:02:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 03:02:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-15 03:02:52,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2019-10-15 03:02:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:52,450 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-15 03:02:52,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 03:02:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-15 03:02:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 03:02:52,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:52,451 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:52,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:52,667 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1081226431, now seen corresponding path program 2 times [2019-10-15 03:02:52,673 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:52,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732411168] [2019-10-15 03:02:52,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:52,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:52,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:53,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732411168] [2019-10-15 03:02:53,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636358051] [2019-10-15 03:02:53,347 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 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 [2019-10-15 03:02:53,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-15 03:02:53,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:53,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:02:53,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:54,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:55,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412673298] [2019-10-15 03:02:55,418 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:02:55,419 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:55,419 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:55,419 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:55,420 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:55,444 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-10-15 03:02:55,644 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-15 03:02:55,651 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:55,785 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-10-15 03:02:56,705 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:56,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 15] total 63 [2019-10-15 03:02:56,706 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906550909] [2019-10-15 03:02:56,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-15 03:02:56,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:56,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-15 03:02:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=2342, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 03:02:56,711 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 63 states. [2019-10-15 03:03:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:00,402 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2019-10-15 03:03:00,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-15 03:03:00,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 30 [2019-10-15 03:03:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:00,405 INFO L225 Difference]: With dead ends: 58 [2019-10-15 03:03:00,405 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 03:03:00,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3702, Invalid=8954, Unknown=0, NotChecked=0, Total=12656 [2019-10-15 03:03:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 03:03:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-15 03:03:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-15 03:03:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-15 03:03:00,419 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2019-10-15 03:03:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:00,420 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-15 03:03:00,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-15 03:03:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-15 03:03:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 03:03:00,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:00,422 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:00,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:00,626 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash -986494017, now seen corresponding path program 3 times [2019-10-15 03:03:00,627 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:00,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046047150] [2019-10-15 03:03:00,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:00,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:00,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:02,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046047150] [2019-10-15 03:03:02,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811889704] [2019-10-15 03:03:02,282 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 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 [2019-10-15 03:03:02,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:03:02,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:02,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 03:03:02,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:04,090 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:09,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318179944] [2019-10-15 03:03:09,201 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:03:09,201 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:09,201 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:09,202 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:09,202 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:09,242 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-10-15 03:03:09,401 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-15 03:03:09,405 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:09,754 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-10-15 03:03:10,324 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2019-10-15 03:03:10,747 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:10,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 15] total 111 [2019-10-15 03:03:10,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694390656] [2019-10-15 03:03:10,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 03:03:10,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 03:03:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5428, Invalid=6782, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 03:03:10,756 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 111 states. [2019-10-15 03:03:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:20,850 INFO L93 Difference]: Finished difference Result 106 states and 153 transitions. [2019-10-15 03:03:20,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-15 03:03:20,854 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 54 [2019-10-15 03:03:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:20,856 INFO L225 Difference]: With dead ends: 106 [2019-10-15 03:03:20,856 INFO L226 Difference]: Without dead ends: 103 [2019-10-15 03:03:20,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 55 SyntacticMatches, 46 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=14238, Invalid=29234, Unknown=0, NotChecked=0, Total=43472 [2019-10-15 03:03:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-15 03:03:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-10-15 03:03:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-15 03:03:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-10-15 03:03:20,880 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2019-10-15 03:03:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:20,881 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-10-15 03:03:20,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-15 03:03:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-10-15 03:03:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-15 03:03:20,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:20,884 INFO L380 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:21,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:21,088 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1451853377, now seen corresponding path program 4 times [2019-10-15 03:03:21,091 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:21,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344387069] [2019-10-15 03:03:21,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:21,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:21,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:27,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344387069] [2019-10-15 03:03:27,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890284586] [2019-10-15 03:03:27,892 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 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 [2019-10-15 03:03:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:28,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 97 conjunts are in the unsatisfiable core [2019-10-15 03:03:28,018 INFO L279 TraceCheckSpWp]: Computing forward predicates...