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-tiling/nr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:06,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:06,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:06,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:06,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:06,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:06,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:06,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:06,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:06,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:06,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:06,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:06,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:06,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:06,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:06,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:06,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:06,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:06,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:06,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:06,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:06,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:06,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:06,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:06,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:06,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:06,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:06,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:06,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:38:06,833 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:06,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:06,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:06,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:06,834 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:06,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:06,835 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:06,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:06,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:06,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:06,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:06,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:06,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:06,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:06,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:06,837 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:06,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:06,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:06,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:06,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:06,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:06,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:06,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:06,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:06,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:06,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:06,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:06,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:06,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:38:07,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:07,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:07,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:07,177 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:07,177 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:07,178 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr5.c [2019-10-15 01:38:07,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec6825c9/9a666bef62de41ada67ff182baed2084/FLAG9975d4741 [2019-10-15 01:38:07,702 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:07,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr5.c [2019-10-15 01:38:07,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec6825c9/9a666bef62de41ada67ff182baed2084/FLAG9975d4741 [2019-10-15 01:38:08,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec6825c9/9a666bef62de41ada67ff182baed2084 [2019-10-15 01:38:08,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:08,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:08,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:08,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:08,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:08,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,111 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:08,125 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:08,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:08,293 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:08,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:08,336 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:08,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08 WrapperNode [2019-10-15 01:38:08,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:08,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:08,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:08,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... [2019-10-15 01:38:08,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:08,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:08,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:08,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:38:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:08,940 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:08,941 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:38:08,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08 BoogieIcfgContainer [2019-10-15 01:38:08,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:08,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:08,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:08,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:08" (1/3) ... [2019-10-15 01:38:08,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9083de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:08" (2/3) ... [2019-10-15 01:38:08,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9083de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08" (3/3) ... [2019-10-15 01:38:08,949 INFO L109 eAbstractionObserver]: Analyzing ICFG nr5.c [2019-10-15 01:38:08,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:08,972 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:08,984 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:09,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:09,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:09,020 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:09,020 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:09,021 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:09,021 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:09,021 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:09,021 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:38:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:09,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,049 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,051 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1436172912, now seen corresponding path program 1 times [2019-10-15 01:38:09,064 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309455077] [2019-10-15 01:38:09,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309455077] [2019-10-15 01:38:09,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:09,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:38:09,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920074376] [2019-10-15 01:38:09,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:38:09,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:38:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:09,501 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-10-15 01:38:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,604 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-15 01:38:09,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:38:09,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:38:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,616 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:38:09,616 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-15 01:38:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:38:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:38:09,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-10-15 01:38:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,663 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:38:09,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:38:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:38:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:38:09,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,665 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,665 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -519328614, now seen corresponding path program 1 times [2019-10-15 01:38:09,666 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681519222] [2019-10-15 01:38:09,667 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,667 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681519222] [2019-10-15 01:38:09,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:09,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:09,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855455688] [2019-10-15 01:38:09,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:09,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:09,744 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-10-15 01:38:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,761 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:38:09,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:09,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:38:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,763 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:38:09,763 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,764 INFO L600 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 [2019-10-15 01:38:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:38:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:38:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:38:09,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-15 01:38:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,772 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:38:09,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:38:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:38:09,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,773 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,773 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash 984169796, now seen corresponding path program 1 times [2019-10-15 01:38:09,774 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089470469] [2019-10-15 01:38:09,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089470469] [2019-10-15 01:38:09,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151591428] [2019-10-15 01:38:09,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:38:09,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,958 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:10,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517670683] [2019-10-15 01:38:10,047 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:10,048 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:10,057 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:10,071 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:10,072 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:10,315 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:10,699 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,095 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,136 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,173 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,189 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,491 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,499 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,507 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,551 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,672 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,683 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,693 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,725 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:11,734 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,101 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,143 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,151 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,160 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,297 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,305 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,476 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-10-15 01:38:12,491 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:12,505 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:12,942 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2019-10-15 01:38:13,394 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:13,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-15 01:38:13,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903502248] [2019-10-15 01:38:13,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:38:13,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:38:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:38:13,398 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-10-15 01:38:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:14,306 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-15 01:38:14,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:38:14,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:38:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:14,307 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:38:14,308 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:38:14,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:38:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:38:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2019-10-15 01:38:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:38:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-15 01:38:14,317 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-15 01:38:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:14,317 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-15 01:38:14,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:38:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-15 01:38:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:38:14,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:14,318 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:14,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:14,524 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash 608143130, now seen corresponding path program 2 times [2019-10-15 01:38:14,525 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:14,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404323478] [2019-10-15 01:38:14,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:14,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:14,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:14,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404323478] [2019-10-15 01:38:14,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127251508] [2019-10-15 01:38:14,609 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:14,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:38:14,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:14,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:38:14,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:14,682 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:14,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043980253] [2019-10-15 01:38:14,707 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:14,707 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:14,707 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:14,708 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:14,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:14,754 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:38:14,900 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,180 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,216 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,264 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,277 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,650 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,702 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,712 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,718 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,809 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,824 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,839 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,876 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,887 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,218 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,267 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,277 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,287 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,366 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,372 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,525 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-10-15 01:38:16,534 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:16,538 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:16,895 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2019-10-15 01:38:17,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:17,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 19 [2019-10-15 01:38:17,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505558759] [2019-10-15 01:38:17,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:38:17,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:38:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:38:17,259 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 19 states. [2019-10-15 01:38:17,501 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-10-15 01:38:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:18,211 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-10-15 01:38:18,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:38:18,212 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2019-10-15 01:38:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:18,213 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:38:18,213 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:38:18,216 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:38:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:38:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2019-10-15 01:38:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:38:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:38:18,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-10-15 01:38:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:18,231 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:38:18,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:38:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:38:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:38:18,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:18,234 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:18,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:18,439 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1576055492, now seen corresponding path program 3 times [2019-10-15 01:38:18,439 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:18,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241610266] [2019-10-15 01:38:18,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:18,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:18,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:18,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241610266] [2019-10-15 01:38:18,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618227546] [2019-10-15 01:38:18,891 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:18,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:38:18,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:18,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 01:38:18,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:18,996 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:19,074 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:19,184 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:19,368 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:19,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:22,996 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 31 [2019-10-15 01:38:23,224 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2019-10-15 01:38:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:23,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602963744] [2019-10-15 01:38:23,433 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:23,434 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:23,434 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:23,434 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:23,435 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:23,469 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:23,666 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,013 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,028 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,042 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,055 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,343 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,358 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,367 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,413 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,483 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,551 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,563 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,574 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,586 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,905 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,935 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,940 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,944 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:24,997 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:25,004 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:25,025 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:25,033 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:25,041 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:25,184 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-10-15 01:38:25,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:25,196 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:26,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:26,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 12] total 43 [2019-10-15 01:38:26,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124180587] [2019-10-15 01:38:26,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-15 01:38:26,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:26,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-15 01:38:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1587, Unknown=2, NotChecked=0, Total=1806 [2019-10-15 01:38:26,477 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 43 states. [2019-10-15 01:38:27,756 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2019-10-15 01:38:28,084 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2019-10-15 01:38:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:30,062 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-10-15 01:38:30,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:38:30,064 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 20 [2019-10-15 01:38:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:30,067 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:38:30,067 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 01:38:30,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=617, Invalid=4211, Unknown=2, NotChecked=0, Total=4830 [2019-10-15 01:38:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 01:38:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2019-10-15 01:38:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:38:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-15 01:38:30,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2019-10-15 01:38:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:30,093 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-15 01:38:30,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-15 01:38:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-15 01:38:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:38:30,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:30,096 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:30,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:30,305 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1455444799, now seen corresponding path program 1 times [2019-10-15 01:38:30,305 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:30,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336492778] [2019-10-15 01:38:30,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:31,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336492778] [2019-10-15 01:38:31,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485580016] [2019-10-15 01:38:31,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:31,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:38:31,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:31,378 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:31,638 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:31,920 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:32,203 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:32,394 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:32,857 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:35,691 INFO L321 TraceCheckSpWp]: Computing backward predicates...