/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-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:19:24,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:19:24,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:19:24,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:19:24,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:19:24,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:19:24,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:19:24,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:19:24,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:19:24,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:19:24,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:19:24,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:19:24,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:19:24,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:19:24,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:19:24,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:19:24,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:19:24,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:19:24,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:19:24,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:19:24,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:19:24,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:19:24,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:19:24,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:19:24,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:19:24,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:19:24,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:19:24,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:19:24,554 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 01:19:24,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:19:24,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:19:24,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:19:24,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:19:24,592 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:19:24,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:19:24,592 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:19:24,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:19:24,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:19:24,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:19:24,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:19:24,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:19:24,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:19:24,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:19:24,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:19:24,595 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:19:24,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:19:24,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:19:24,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:19:24,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:19:24,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:19:24,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:19:24,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:19:24,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:19:24,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:19:24,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:19:24,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:19:24,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:19:24,597 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 01:19:24,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:19:24,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:19:24,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:19:24,886 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:19:24,886 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:19:24,887 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-07 01:19:24,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42def72f/23131d61e6df4e219eb1b2ef1e5f3c49/FLAG4c4593a46 [2019-11-07 01:19:25,444 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:19:25,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-07 01:19:25,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42def72f/23131d61e6df4e219eb1b2ef1e5f3c49/FLAG4c4593a46 [2019-11-07 01:19:25,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42def72f/23131d61e6df4e219eb1b2ef1e5f3c49 [2019-11-07 01:19:25,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:19:25,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:19:25,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:19:25,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:19:25,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:19:25,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:25" (1/1) ... [2019-11-07 01:19:25,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6643e059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:25, skipping insertion in model container [2019-11-07 01:19:25,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:25" (1/1) ... [2019-11-07 01:19:25,893 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:19:25,948 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:19:26,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:19:26,275 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:19:26,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:19:26,426 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:19:26,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26 WrapperNode [2019-11-07 01:19:26,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:19:26,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:19:26,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:19:26,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:19:26,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... [2019-11-07 01:19:26,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:19:26,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:19:26,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:19:26,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:19:26,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:19:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:19:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:19:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:19:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:19:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:19:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:19:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:19:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-11-07 01:19:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:19:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:19:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:19:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:19:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:19:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:19:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:19:27,131 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:19:27,131 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-07 01:19:27,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:27 BoogieIcfgContainer [2019-11-07 01:19:27,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:19:27,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:19:27,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:19:27,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:19:27,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:19:25" (1/3) ... [2019-11-07 01:19:27,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ac784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:27, skipping insertion in model container [2019-11-07 01:19:27,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:26" (2/3) ... [2019-11-07 01:19:27,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ac784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:27, skipping insertion in model container [2019-11-07 01:19:27,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:27" (3/3) ... [2019-11-07 01:19:27,142 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-11-07 01:19:27,153 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:19:27,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:19:27,175 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:19:27,208 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:19:27,208 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:19:27,209 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:19:27,209 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:19:27,209 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:19:27,209 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:19:27,210 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:19:27,210 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:19:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-07 01:19:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:19:27,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:27,239 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:27,241 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:27,248 INFO L82 PathProgramCache]: Analyzing trace with hash -205990741, now seen corresponding path program 1 times [2019-11-07 01:19:27,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:27,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157620171] [2019-11-07 01:19:27,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:27,494 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 01:19:27,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157620171] [2019-11-07 01:19:27,496 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:19:27,496 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:19:27,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651140305] [2019-11-07 01:19:27,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:19:27,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:19:27,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:19:27,521 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2019-11-07 01:19:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:27,652 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-11-07 01:19:27,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:19:27,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-07 01:19:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:27,665 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:19:27,665 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:19:27,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:19:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:19:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-07 01:19:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:19:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2019-11-07 01:19:27,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 21 [2019-11-07 01:19:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:27,715 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2019-11-07 01:19:27,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:19:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2019-11-07 01:19:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:19:27,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:27,717 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:27,717 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash 940905143, now seen corresponding path program 1 times [2019-11-07 01:19:27,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:27,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589778602] [2019-11-07 01:19:27,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:19:27,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589778602] [2019-11-07 01:19:27,798 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:19:27,800 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:19:27,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239829268] [2019-11-07 01:19:27,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:19:27,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:27,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:19:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:19:27,803 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 3 states. [2019-11-07 01:19:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:27,869 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2019-11-07 01:19:27,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:19:27,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-07 01:19:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:27,872 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:19:27,872 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 01:19:27,873 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 01:19:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 01:19:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-07 01:19:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:19:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2019-11-07 01:19:27,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 22 [2019-11-07 01:19:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:27,883 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2019-11-07 01:19:27,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:19:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2019-11-07 01:19:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 01:19:27,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:27,884 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:27,885 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1041186174, now seen corresponding path program 1 times [2019-11-07 01:19:27,886 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:27,886 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127156104] [2019-11-07 01:19:27,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:19:27,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127156104] [2019-11-07 01:19:27,974 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:19:27,974 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:19:27,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721190457] [2019-11-07 01:19:27,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:19:27,976 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:19:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:19:27,978 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states. [2019-11-07 01:19:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:28,133 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2019-11-07 01:19:28,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:19:28,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-07 01:19:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:28,134 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:19:28,134 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 01:19:28,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:19:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 01:19:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-07 01:19:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:19:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-07 01:19:28,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 23 [2019-11-07 01:19:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:28,154 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-07 01:19:28,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:19:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-07 01:19:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:19:28,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:28,155 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:28,158 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash 608840992, now seen corresponding path program 1 times [2019-11-07 01:19:28,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:28,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354648047] [2019-11-07 01:19:28,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:19:28,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354648047] [2019-11-07 01:19:28,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915421310] [2019-11-07 01:19:28,286 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 01:19:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:28,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:19:28,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:19:28,421 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:19:28,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385734799] [2019-11-07 01:19:28,477 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:28,477 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:28,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:28,491 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:28,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:28,639 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:19:29,064 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:29,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:29,080 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:19:29,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:19:29,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-11-07 01:19:29,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302555335] [2019-11-07 01:19:29,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:19:29,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:19:29,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:19:29,340 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 17 states. [2019-11-07 01:19:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:29,792 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-11-07 01:19:29,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 01:19:29,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-11-07 01:19:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:29,793 INFO L225 Difference]: With dead ends: 59 [2019-11-07 01:19:29,793 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:19:29,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:19:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:19:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-07 01:19:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 01:19:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-11-07 01:19:29,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 32 [2019-11-07 01:19:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:29,802 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-11-07 01:19:29,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:19:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-11-07 01:19:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:19:29,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:29,804 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:30,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:30,008 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1126249689, now seen corresponding path program 2 times [2019-11-07 01:19:30,011 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:30,011 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365288696] [2019-11-07 01:19:30,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:19:30,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365288696] [2019-11-07 01:19:30,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340281199] [2019-11-07 01:19:30,218 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 01:19:30,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:19:30,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:19:30,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:19:30,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:19:30,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:19:30,367 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919365907] [2019-11-07 01:19:30,369 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:30,370 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:30,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:30,371 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:30,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:30,413 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:19:30,693 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:30,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:30,701 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:19:31,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:19:31,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 18 [2019-11-07 01:19:31,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953113535] [2019-11-07 01:19:31,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:19:31,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:19:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:19:31,016 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 18 states. [2019-11-07 01:19:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:31,434 INFO L93 Difference]: Finished difference Result 67 states and 95 transitions. [2019-11-07 01:19:31,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:19:31,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2019-11-07 01:19:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:31,435 INFO L225 Difference]: With dead ends: 67 [2019-11-07 01:19:31,435 INFO L226 Difference]: Without dead ends: 44 [2019-11-07 01:19:31,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:19:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-07 01:19:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-07 01:19:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 01:19:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-07 01:19:31,444 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 33 [2019-11-07 01:19:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:31,444 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-07 01:19:31,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:19:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-07 01:19:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:19:31,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:31,446 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:31,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:31,647 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1666989621, now seen corresponding path program 3 times [2019-11-07 01:19:31,648 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:31,649 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131762551] [2019-11-07 01:19:31,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:19:33,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131762551] [2019-11-07 01:19:33,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897495075] [2019-11-07 01:19:33,513 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 01:19:33,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:19:33,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:19:33,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 90 conjunts are in the unsatisfiable core [2019-11-07 01:19:33,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:19:34,670 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:19:36,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286225676] [2019-11-07 01:19:36,641 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:36,641 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:36,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:36,642 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:36,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:36,672 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:19:36,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:36,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:36,890 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:19:37,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:19:37,945 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 30, 11] total 76 [2019-11-07 01:19:37,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680900451] [2019-11-07 01:19:37,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-11-07 01:19:37,946 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-11-07 01:19:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=5460, Unknown=0, NotChecked=0, Total=5700 [2019-11-07 01:19:37,951 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 76 states. [2019-11-07 01:19:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:41,101 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-11-07 01:19:41,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-07 01:19:41,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 43 [2019-11-07 01:19:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:41,104 INFO L225 Difference]: With dead ends: 77 [2019-11-07 01:19:41,104 INFO L226 Difference]: Without dead ends: 72 [2019-11-07 01:19:41,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 68 SyntacticMatches, 23 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=327, Invalid=7505, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 01:19:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-07 01:19:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-07 01:19:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-07 01:19:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2019-11-07 01:19:41,118 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 43 [2019-11-07 01:19:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:41,118 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2019-11-07 01:19:41,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-11-07 01:19:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2019-11-07 01:19:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-07 01:19:41,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:41,120 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:41,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:41,323 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash -893816937, now seen corresponding path program 4 times [2019-11-07 01:19:41,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:41,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137410134] [2019-11-07 01:19:41,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 01:19:41,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137410134] [2019-11-07 01:19:41,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154447708] [2019-11-07 01:19:41,411 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 01:19:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:41,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:19:41,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 01:19:41,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 01:19:41,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477876779] [2019-11-07 01:19:41,593 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:41,594 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:41,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:41,596 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:41,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:41,622 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 01:19:41,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:41,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:41,870 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:19:42,133 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:19:42,133 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 23 [2019-11-07 01:19:42,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459702096] [2019-11-07 01:19:42,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:19:42,135 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:19:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:19:42,136 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 23 states. [2019-11-07 01:19:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:42,730 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2019-11-07 01:19:42,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:19:42,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-11-07 01:19:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:42,732 INFO L225 Difference]: With dead ends: 134 [2019-11-07 01:19:42,732 INFO L226 Difference]: Without dead ends: 71 [2019-11-07 01:19:42,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:19:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-07 01:19:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-07 01:19:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-07 01:19:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2019-11-07 01:19:42,744 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 44 [2019-11-07 01:19:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:42,744 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2019-11-07 01:19:42,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:19:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2019-11-07 01:19:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 01:19:42,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:42,757 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:42,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:42,958 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1998177506, now seen corresponding path program 5 times [2019-11-07 01:19:42,959 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:42,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391451652] [2019-11-07 01:19:42,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:19:43,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391451652] [2019-11-07 01:19:43,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099168169] [2019-11-07 01:19:43,111 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 [2019-11-07 01:19:43,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:19:43,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:19:43,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:19:43,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:19:43,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:19:43,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143895210] [2019-11-07 01:19:43,347 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:43,348 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:43,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:43,348 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:43,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:43,374 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-11-07 01:19:43,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:43,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:43,532 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:19:43,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:19:43,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 26 [2019-11-07 01:19:43,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208481635] [2019-11-07 01:19:43,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:19:43,824 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:19:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:19:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:19:43,825 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 26 states. [2019-11-07 01:19:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:19:44,611 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2019-11-07 01:19:44,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 01:19:44,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2019-11-07 01:19:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:19:44,612 INFO L225 Difference]: With dead ends: 110 [2019-11-07 01:19:44,613 INFO L226 Difference]: Without dead ends: 55 [2019-11-07 01:19:44,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 01:19:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-07 01:19:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-07 01:19:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-07 01:19:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-11-07 01:19:44,620 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 45 [2019-11-07 01:19:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:19:44,621 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-11-07 01:19:44,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:19:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-11-07 01:19:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-07 01:19:44,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:19:44,622 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:19:44,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:44,836 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:19:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:19:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1338189056, now seen corresponding path program 6 times [2019-11-07 01:19:44,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:19:44,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277522030] [2019-11-07 01:19:44,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:19:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:19:45,642 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 14 [2019-11-07 01:19:45,865 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2019-11-07 01:19:46,089 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2019-11-07 01:19:46,264 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2019-11-07 01:19:46,496 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 34 [2019-11-07 01:19:46,747 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2019-11-07 01:19:46,961 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2019-11-07 01:19:47,164 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2019-11-07 01:19:47,392 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 36 [2019-11-07 01:19:47,654 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2019-11-07 01:19:47,872 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2019-11-07 01:19:48,079 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2019-11-07 01:19:48,295 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2019-11-07 01:19:48,518 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2019-11-07 01:19:48,724 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2019-11-07 01:19:48,924 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2019-11-07 01:19:49,128 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2019-11-07 01:19:49,325 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2019-11-07 01:19:49,524 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2019-11-07 01:19:49,734 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2019-11-07 01:19:49,915 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2019-11-07 01:19:50,120 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-11-07 01:19:50,309 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2019-11-07 01:19:50,584 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-11-07 01:19:50,782 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2019-11-07 01:19:51,020 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2019-11-07 01:19:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:19:52,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277522030] [2019-11-07 01:19:52,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253836651] [2019-11-07 01:19:52,032 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:19:52,121 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:19:52,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:19:52,126 WARN L254 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 130 conjunts are in the unsatisfiable core [2019-11-07 01:19:52,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:19:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:19:54,522 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:19:58,968 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 29 [2019-11-07 01:19:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:19:59,197 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305434028] [2019-11-07 01:19:59,203 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:19:59,203 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:19:59,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:19:59,205 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:19:59,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:19:59,228 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 01:19:59,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:19:59,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-11-07 01:19:59,464 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:20:01,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:20:01,255 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 37, 40, 11] total 121 [2019-11-07 01:20:01,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896378073] [2019-11-07 01:20:01,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-11-07 01:20:01,257 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:20:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-11-07 01:20:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=13941, Unknown=0, NotChecked=0, Total=14520 [2019-11-07 01:20:01,262 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 121 states.