/usr/bin/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/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:06,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:24:06,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:24:06,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:24:06,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:06,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:06,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:06,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:06,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:06,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:06,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:06,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:06,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:06,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:06,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:06,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:06,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:06,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:06,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:06,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:06,246 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 [2019-11-07 01:24:06,260 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:06,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:06,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:06,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:06,262 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:06,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:06,262 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:06,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:06,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:06,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:06,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:06,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:06,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:06,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:06,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:06,264 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:06,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:06,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:06,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:06,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:06,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:06,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:06,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:06,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:06,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:06,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:06,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:06,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:06,267 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 [2019-11-07 01:24:06,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:06,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:06,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:06,566 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:06,566 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:06,567 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-07 01:24:06,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e672565/4544b14c6e2a4a0da69a299394cdb89a/FLAG8a7c882b7 [2019-11-07 01:24:07,109 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:07,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-07 01:24:07,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e672565/4544b14c6e2a4a0da69a299394cdb89a/FLAG8a7c882b7 [2019-11-07 01:24:07,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e672565/4544b14c6e2a4a0da69a299394cdb89a [2019-11-07 01:24:07,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:07,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:07,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:07,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:07,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:07,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb7612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07, skipping insertion in model container [2019-11-07 01:24:07,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,561 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:07,604 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:07,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:07,891 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:07,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:07,944 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:07,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07 WrapperNode [2019-11-07 01:24:07,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:07,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:07,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:07,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:08,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:08,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:08,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:08,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:08,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:08,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (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 [2019-11-07 01:24:08,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:08,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:08,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:08,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:08,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:08,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:08,526 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:08,527 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:24:08,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:08 BoogieIcfgContainer [2019-11-07 01:24:08,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:08,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:08,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:08,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:08,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:07" (1/3) ... [2019-11-07 01:24:08,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8c5afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:08, skipping insertion in model container [2019-11-07 01:24:08,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (2/3) ... [2019-11-07 01:24:08,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8c5afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:08, skipping insertion in model container [2019-11-07 01:24:08,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:08" (3/3) ... [2019-11-07 01:24:08,536 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2019-11-07 01:24:08,545 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:08,551 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:08,563 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:08,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:08,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:08,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:08,590 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:08,591 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:08,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:08,591 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:08,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 01:24:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:24:08,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:08,616 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:08,618 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:08,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2001495867, now seen corresponding path program 1 times [2019-11-07 01:24:08,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:08,632 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962460304] [2019-11-07 01:24:08,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:24:08,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962460304] [2019-11-07 01:24:08,803 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:08,804 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:08,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704175961] [2019-11-07 01:24:08,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:08,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:08,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:08,827 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-07 01:24:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:08,906 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:24:08,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:08,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 01:24:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:08,917 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:24:08,917 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:24:08,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:24:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:24:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:24:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:24:08,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-11-07 01:24:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:08,962 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:24:08,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:24:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:24:08,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:08,964 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:08,964 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1527613737, now seen corresponding path program 1 times [2019-11-07 01:24:08,965 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:08,965 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315668896] [2019-11-07 01:24:08,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:09,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315668896] [2019-11-07 01:24:09,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116675597] [2019-11-07 01:24:09,032 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 [2019-11-07 01:24:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:09,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:09,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:09,126 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:09,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901831743] [2019-11-07 01:24:09,190 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:09,190 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:09,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:09,204 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:09,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:09,341 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:10,041 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:10,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:10,055 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:10,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:10,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:10,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576239771] [2019-11-07 01:24:10,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:10,441 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:10,442 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-11-07 01:24:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:11,297 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-11-07 01:24:11,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:11,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-11-07 01:24:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:11,300 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:24:11,300 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 01:24:11,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:24:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 01:24:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-11-07 01:24:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 01:24:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-07 01:24:11,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2019-11-07 01:24:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:11,322 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-07 01:24:11,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-07 01:24:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 01:24:11,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:11,329 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:11,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:11,531 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash -549318725, now seen corresponding path program 2 times [2019-11-07 01:24:11,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:11,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805769867] [2019-11-07 01:24:11,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:11,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805769867] [2019-11-07 01:24:11,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746324276] [2019-11-07 01:24:11,666 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 [2019-11-07 01:24:11,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:11,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:11,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:11,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:11,757 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:11,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279760330] [2019-11-07 01:24:11,825 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:11,825 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:11,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:11,826 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:11,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:11,856 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:12,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:12,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:12,198 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:12,567 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:12,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:12,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680355889] [2019-11-07 01:24:12,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:12,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:12,570 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 23 states. [2019-11-07 01:24:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:13,659 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2019-11-07 01:24:13,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:13,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-11-07 01:24:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:13,661 INFO L225 Difference]: With dead ends: 91 [2019-11-07 01:24:13,661 INFO L226 Difference]: Without dead ends: 67 [2019-11-07 01:24:13,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:24:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-07 01:24:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2019-11-07 01:24:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-07 01:24:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-07 01:24:13,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2019-11-07 01:24:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:13,677 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-07 01:24:13,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-07 01:24:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-07 01:24:13,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:13,679 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:13,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:13,883 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -622463877, now seen corresponding path program 3 times [2019-11-07 01:24:13,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:13,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11270649] [2019-11-07 01:24:13,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:14,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11270649] [2019-11-07 01:24:14,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475757897] [2019-11-07 01:24:14,114 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 [2019-11-07 01:24:14,192 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:14,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:14,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:14,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:14,219 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:14,445 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000309620] [2019-11-07 01:24:14,447 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:14,447 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:14,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:14,448 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:14,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:14,486 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:14,791 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:14,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:14,801 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:15,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:15,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:15,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659249147] [2019-11-07 01:24:15,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:15,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:15,165 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 35 states. [2019-11-07 01:24:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:17,319 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2019-11-07 01:24:17,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:17,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 54 [2019-11-07 01:24:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:17,321 INFO L225 Difference]: With dead ends: 157 [2019-11-07 01:24:17,322 INFO L226 Difference]: Without dead ends: 115 [2019-11-07 01:24:17,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:24:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-07 01:24:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-11-07 01:24:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-07 01:24:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-11-07 01:24:17,349 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 54 [2019-11-07 01:24:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:17,349 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-11-07 01:24:17,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-11-07 01:24:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 01:24:17,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:17,353 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:17,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:17,558 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1843842555, now seen corresponding path program 4 times [2019-11-07 01:24:17,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:17,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876873181] [2019-11-07 01:24:17,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:17,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876873181] [2019-11-07 01:24:17,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405956989] [2019-11-07 01:24:17,983 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 [2019-11-07 01:24:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:18,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:18,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:18,129 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:18,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310296201] [2019-11-07 01:24:18,859 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:18,859 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:18,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:18,860 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:18,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:18,876 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:19,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:19,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:19,134 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:19,637 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:19,638 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:24:19,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897117173] [2019-11-07 01:24:19,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:24:19,640 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:24:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:24:19,643 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 59 states. [2019-11-07 01:24:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:24,488 INFO L93 Difference]: Finished difference Result 289 states and 392 transitions. [2019-11-07 01:24:24,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:24:24,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 102 [2019-11-07 01:24:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:24,492 INFO L225 Difference]: With dead ends: 289 [2019-11-07 01:24:24,492 INFO L226 Difference]: Without dead ends: 211 [2019-11-07 01:24:24,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:24:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-07 01:24:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2019-11-07 01:24:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-07 01:24:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-11-07 01:24:24,522 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 102 [2019-11-07 01:24:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:24,522 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-11-07 01:24:24,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:24:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-11-07 01:24:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-07 01:24:24,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:24,526 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:24,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:24,734 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash -171130629, now seen corresponding path program 5 times [2019-11-07 01:24:24,734 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:24,735 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769586004] [2019-11-07 01:24:24,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2019-11-07 01:24:25,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769586004] [2019-11-07 01:24:25,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431490376] [2019-11-07 01:24:25,988 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 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