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_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:00,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:00,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:00,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:00,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:00,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:00,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:01,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:01,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:01,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:01,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:01,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:01,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:01,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:01,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:01,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:01,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:01,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:01,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:01,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:01,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:01,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:01,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:01,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:01,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:01,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:01,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:01,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:01,065 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 01:31:01,081 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:01,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:01,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:01,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:01,083 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:01,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:01,083 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:01,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:01,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:01,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:01,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:01,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:01,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:01,085 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:01,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:01,085 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:01,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:01,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:01,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:01,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:01,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:01,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:01,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:01,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:01,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:01,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:01,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:01,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:01,088 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 01:31:01,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:01,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:01,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:01,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:01,415 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:01,415 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-15 01:31:01,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77ff1ec2/ef3aefadd4c44e61b19f80bf606488b3/FLAGd0ca8d36d [2019-10-15 01:31:01,930 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:01,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-15 01:31:01,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77ff1ec2/ef3aefadd4c44e61b19f80bf606488b3/FLAGd0ca8d36d [2019-10-15 01:31:02,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77ff1ec2/ef3aefadd4c44e61b19f80bf606488b3 [2019-10-15 01:31:02,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:02,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:02,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:02,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:02,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:02,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60587208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02, skipping insertion in model container [2019-10-15 01:31:02,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,341 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:02,363 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:02,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:02,559 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:02,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:02,621 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:02,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02 WrapperNode [2019-10-15 01:31:02,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:02,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:02,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:02,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:02,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (1/1) ... [2019-10-15 01:31:02,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:02,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:02,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:02,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:02,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (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 01:31:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:02,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:31:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 01:31:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:31:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:31:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:03,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:03,406 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 01:31:03,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:03 BoogieIcfgContainer [2019-10-15 01:31:03,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:03,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:03,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:03,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:03,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:02" (1/3) ... [2019-10-15 01:31:03,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2cb0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:03, skipping insertion in model container [2019-10-15 01:31:03,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:02" (2/3) ... [2019-10-15 01:31:03,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2cb0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:03, skipping insertion in model container [2019-10-15 01:31:03,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:03" (3/3) ... [2019-10-15 01:31:03,418 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-10-15 01:31:03,429 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:03,439 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:03,451 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:03,479 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:03,480 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:03,480 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:03,480 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:03,480 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:03,481 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:03,481 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:03,481 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-15 01:31:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:31:03,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:03,510 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:03,512 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1883974854, now seen corresponding path program 1 times [2019-10-15 01:31:03,530 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:03,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676247132] [2019-10-15 01:31:03,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:03,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:03,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:03,806 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 01:31:03,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676247132] [2019-10-15 01:31:03,808 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:03,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:03,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186326269] [2019-10-15 01:31:03,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:03,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:03,834 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-10-15 01:31:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:03,971 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2019-10-15 01:31:03,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:31:03,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 01:31:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:03,982 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:31:03,983 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:31:03,986 INFO L600 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 [2019-10-15 01:31:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:31:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:31:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2019-10-15 01:31:04,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 21 [2019-10-15 01:31:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:04,024 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2019-10-15 01:31:04,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2019-10-15 01:31:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:31:04,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:04,026 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:04,026 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash 75212444, now seen corresponding path program 1 times [2019-10-15 01:31:04,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:04,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577318048] [2019-10-15 01:31:04,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:04,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577318048] [2019-10-15 01:31:04,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:04,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:04,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016864769] [2019-10-15 01:31:04,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:04,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:04,133 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 3 states. [2019-10-15 01:31:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:04,192 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2019-10-15 01:31:04,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:04,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-10-15 01:31:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:04,194 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:31:04,194 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:31:04,195 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 01:31:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:31:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 01:31:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:31:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2019-10-15 01:31:04,204 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 22 [2019-10-15 01:31:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:04,205 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2019-10-15 01:31:04,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2019-10-15 01:31:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:31:04,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:04,207 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:04,207 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:04,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1456530685, now seen corresponding path program 1 times [2019-10-15 01:31:04,208 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:04,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329111128] [2019-10-15 01:31:04,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:04,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329111128] [2019-10-15 01:31:04,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:04,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:04,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995221090] [2019-10-15 01:31:04,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:04,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:04,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:04,278 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states. [2019-10-15 01:31:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:04,409 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2019-10-15 01:31:04,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:04,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-15 01:31:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:04,411 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:31:04,411 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:31:04,412 INFO L600 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 [2019-10-15 01:31:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:31:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 01:31:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:31:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-10-15 01:31:04,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 23 [2019-10-15 01:31:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:04,420 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-10-15 01:31:04,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-10-15 01:31:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:04,421 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:04,421 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:04,422 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:04,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2063924474, now seen corresponding path program 1 times [2019-10-15 01:31:04,422 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:04,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566769704] [2019-10-15 01:31:04,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:04,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:04,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566769704] [2019-10-15 01:31:04,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674853381] [2019-10-15 01:31:04,546 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 01:31:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:04,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:04,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:04,701 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:04,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915270908] [2019-10-15 01:31:04,763 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:04,763 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:04,770 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:04,778 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:04,778 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:04,956 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:06,914 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:06,968 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:06,975 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:07,445 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:07,830 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2019-10-15 01:31:07,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:07,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 11] total 19 [2019-10-15 01:31:07,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843002965] [2019-10-15 01:31:07,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:07,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:07,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:07,840 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 19 states. [2019-10-15 01:31:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:09,000 INFO L93 Difference]: Finished difference Result 69 states and 99 transitions. [2019-10-15 01:31:09,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:31:09,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-10-15 01:31:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:09,002 INFO L225 Difference]: With dead ends: 69 [2019-10-15 01:31:09,002 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:31:09,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:31:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:31:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-15 01:31:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:31:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-15 01:31:09,014 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-15 01:31:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:09,014 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-15 01:31:09,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-15 01:31:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:31:09,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:09,016 INFO L380 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] [2019-10-15 01:31:09,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:09,225 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash 981880454, now seen corresponding path program 2 times [2019-10-15 01:31:09,226 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:09,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965918148] [2019-10-15 01:31:09,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:09,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:09,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:10,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965918148] [2019-10-15 01:31:10,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688301641] [2019-10-15 01:31:10,439 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 01:31:10,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:10,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:10,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 92 conjunts are in the unsatisfiable core [2019-10-15 01:31:10,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:10,899 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:11,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612052929] [2019-10-15 01:31:11,457 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:11,458 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:11,458 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:11,458 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:11,459 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:11,491 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:12,855 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:12,910 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:12,921 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:14,167 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:14,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11, 11] total 38 [2019-10-15 01:31:14,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654318396] [2019-10-15 01:31:14,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:31:14,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:31:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:31:14,171 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 38 states. [2019-10-15 01:31:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:16,482 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-10-15 01:31:16,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:31:16,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-10-15 01:31:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:16,484 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:31:16,484 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 01:31:16,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 35 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=238, Invalid=2518, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:31:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 01:31:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-15 01:31:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-15 01:31:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2019-10-15 01:31:16,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 43 [2019-10-15 01:31:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:16,503 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2019-10-15 01:31:16,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:31:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2019-10-15 01:31:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:31:16,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:16,505 INFO L380 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] [2019-10-15 01:31:16,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:16,716 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1460027300, now seen corresponding path program 3 times [2019-10-15 01:31:16,717 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:16,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752480509] [2019-10-15 01:31:16,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:16,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752480509] [2019-10-15 01:31:16,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224686841] [2019-10-15 01:31:16,799 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 01:31:16,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:16,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:16,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:16,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:16,960 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:16,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85090542] [2019-10-15 01:31:16,999 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:17,000 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:17,000 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:17,000 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:17,001 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:17,035 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:18,184 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:18,222 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:18,226 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:18,704 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2019-10-15 01:31:19,068 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:19,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25 [2019-10-15 01:31:19,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702387090] [2019-10-15 01:31:19,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:19,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:19,071 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 25 states. [2019-10-15 01:31:20,431 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-10-15 01:31:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:20,750 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2019-10-15 01:31:20,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 01:31:20,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2019-10-15 01:31:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:20,754 INFO L225 Difference]: With dead ends: 148 [2019-10-15 01:31:20,755 INFO L226 Difference]: Without dead ends: 85 [2019-10-15 01:31:20,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:31:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-15 01:31:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2019-10-15 01:31:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-15 01:31:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2019-10-15 01:31:20,772 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 44 [2019-10-15 01:31:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:20,773 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2019-10-15 01:31:20,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2019-10-15 01:31:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:31:20,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:20,774 INFO L380 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] [2019-10-15 01:31:20,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:20,978 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1604823922, now seen corresponding path program 4 times [2019-10-15 01:31:20,979 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:20,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588476006] [2019-10-15 01:31:20,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:21,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588476006] [2019-10-15 01:31:21,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169264325] [2019-10-15 01:31:21,046 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:21,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:21,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:21,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140487956] [2019-10-15 01:31:21,339 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:21,339 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:21,340 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:21,340 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:21,341 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:21,366 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:31:22,319 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:22,343 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:22,347 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:22,817 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2019-10-15 01:31:23,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:23,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25 [2019-10-15 01:31:23,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587217394] [2019-10-15 01:31:23,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:23,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:23,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:23,176 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 25 states. [2019-10-15 01:31:24,726 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-10-15 01:31:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:24,801 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2019-10-15 01:31:24,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:31:24,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2019-10-15 01:31:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:24,806 INFO L225 Difference]: With dead ends: 84 [2019-10-15 01:31:24,806 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:31:24,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:31:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:31:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-15 01:31:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-15 01:31:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-15 01:31:24,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 45 [2019-10-15 01:31:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:24,816 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-15 01:31:24,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-15 01:31:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:31:24,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:24,818 INFO L380 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] [2019-10-15 01:31:25,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:25,027 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1820325702, now seen corresponding path program 5 times [2019-10-15 01:31:25,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:25,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384493007] [2019-10-15 01:31:25,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:25,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:26,578 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2019-10-15 01:31:26,755 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2019-10-15 01:31:26,920 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2019-10-15 01:31:27,081 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2019-10-15 01:31:27,309 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-10-15 01:31:27,627 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-10-15 01:31:27,837 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-10-15 01:31:28,082 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-15 01:31:28,282 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2019-10-15 01:31:28,458 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2019-10-15 01:31:28,681 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-10-15 01:31:28,878 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2019-10-15 01:31:29,033 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2019-10-15 01:31:29,183 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2019-10-15 01:31:29,373 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-10-15 01:31:29,553 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 01:31:30,022 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-10-15 01:31:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:30,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384493007] [2019-10-15 01:31:30,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019690788] [2019-10-15 01:31:30,549 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 [2019-10-15 01:31:30,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:30,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:30,719 WARN L254 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 146 conjunts are in the unsatisfiable core [2019-10-15 01:31:30,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:32,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:35,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794705964] [2019-10-15 01:31:35,876 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:35,876 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:35,877 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:35,877 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:35,877 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:35,918 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:31:37,195 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2019-10-15 01:31:37,226 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:31:37,233 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:38,582 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:38,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 16, 13, 11] total 72 [2019-10-15 01:31:38,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110452222] [2019-10-15 01:31:38,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-15 01:31:38,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-15 01:31:38,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=4621, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:31:38,587 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 72 states.