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/nla-digbench/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:35,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:35,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:35,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:35,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:35,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:35,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:35,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:35,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:35,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:35,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:35,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:35,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:35,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:35,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:35,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:35,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:35,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:35,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:35,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:35,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:35,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:35,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:35,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:35,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:04:35,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:04:35,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:04:35,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:04:35,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:04:35,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:04:35,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:04:35,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:04:35,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:04:35,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:04:35,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:04:35,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:04:35,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:04:35,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:04:35,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:35,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:35,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:35,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:04:35,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:35,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:35,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:35,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:35,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:35,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:35,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:35,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:35,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:35,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:35,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:35,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:35,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:35,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:35,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:35,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:35,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:35,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:35,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:35,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:35,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:35,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:35,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:35,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:35,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:35,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:35,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:35,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:35,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:04:35,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:35,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:35,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:35,567 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:35,567 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:35,568 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2019-10-15 03:04:35,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023830cbc/35921f8cd8e7405a96fe1af68cdcb017/FLAGb4d81641a [2019-10-15 03:04:36,208 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:36,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2019-10-15 03:04:36,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023830cbc/35921f8cd8e7405a96fe1af68cdcb017/FLAGb4d81641a [2019-10-15 03:04:36,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023830cbc/35921f8cd8e7405a96fe1af68cdcb017 [2019-10-15 03:04:36,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:36,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:36,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:36,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:36,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:36,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e46ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36, skipping insertion in model container [2019-10-15 03:04:36,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,572 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:36,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:36,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:36,777 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:36,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:36,810 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:36,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36 WrapperNode [2019-10-15 03:04:36,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:36,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:36,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:36,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:36,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... [2019-10-15 03:04:36,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:36,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:36,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:36,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:36,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:04:37,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:04:37,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:37,315 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:37,316 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:04:37,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:37 BoogieIcfgContainer [2019-10-15 03:04:37,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:37,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:37,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:37,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:37,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:36" (1/3) ... [2019-10-15 03:04:37,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a85341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:37, skipping insertion in model container [2019-10-15 03:04:37,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:36" (2/3) ... [2019-10-15 03:04:37,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a85341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:37, skipping insertion in model container [2019-10-15 03:04:37,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:37" (3/3) ... [2019-10-15 03:04:37,344 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm1.c [2019-10-15 03:04:37,358 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:37,366 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:37,378 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:37,415 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:37,415 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:37,416 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:37,416 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:37,416 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:37,416 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:37,416 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:37,416 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 03:04:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:37,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:37,441 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:37,443 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash -801078501, now seen corresponding path program 1 times [2019-10-15 03:04:37,457 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:37,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524596832] [2019-10-15 03:04:37,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:37,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:37,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:37,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524596832] [2019-10-15 03:04:37,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:37,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:04:37,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615144918] [2019-10-15 03:04:37,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:04:37,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:37,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:04:37,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:37,600 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-10-15 03:04:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:37,631 INFO L93 Difference]: Finished difference Result 47 states and 72 transitions. [2019-10-15 03:04:37,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:04:37,633 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 03:04:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:37,641 INFO L225 Difference]: With dead ends: 47 [2019-10-15 03:04:37,641 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:04:37,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:04:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:04:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:04:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 03:04:37,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-10-15 03:04:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:37,687 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 03:04:37,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:04:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 03:04:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:37,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:37,688 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:37,689 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -871444843, now seen corresponding path program 1 times [2019-10-15 03:04:37,689 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:37,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642860499] [2019-10-15 03:04:37,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:37,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:37,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:37,700 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:37,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982823860] [2019-10-15 03:04:37,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:37,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:04:37,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:37,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:37,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642860499] [2019-10-15 03:04:37,986 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:37,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982823860] [2019-10-15 03:04:37,987 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:37,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:04:37,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336752047] [2019-10-15 03:04:37,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:37,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:37,993 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2019-10-15 03:04:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:38,237 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-15 03:04:38,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:38,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-15 03:04:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:38,239 INFO L225 Difference]: With dead ends: 39 [2019-10-15 03:04:38,240 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 03:04:38,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 03:04:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-15 03:04:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 03:04:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-10-15 03:04:38,257 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 10 [2019-10-15 03:04:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:38,258 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-10-15 03:04:38,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-10-15 03:04:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:04:38,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:38,259 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:38,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:38,473 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1387131099, now seen corresponding path program 1 times [2019-10-15 03:04:38,474 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:38,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419394049] [2019-10-15 03:04:38,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:38,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:38,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:38,494 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:38,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784053290] [2019-10-15 03:04:38,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:38,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 03:04:38,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:38,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:38,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419394049] [2019-10-15 03:04:38,775 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:38,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784053290] [2019-10-15 03:04:38,778 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:38,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-10-15 03:04:38,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505135662] [2019-10-15 03:04:38,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:04:38,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:04:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:04:38,782 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 10 states. [2019-10-15 03:04:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:39,045 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2019-10-15 03:04:39,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:04:39,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-15 03:04:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:39,051 INFO L225 Difference]: With dead ends: 73 [2019-10-15 03:04:39,051 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 03:04:39,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:04:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 03:04:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-15 03:04:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 03:04:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2019-10-15 03:04:39,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 16 [2019-10-15 03:04:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:39,075 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2019-10-15 03:04:39,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:04:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2019-10-15 03:04:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:04:39,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:39,078 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:39,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:39,282 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1615934296, now seen corresponding path program 1 times [2019-10-15 03:04:39,283 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:39,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611315781] [2019-10-15 03:04:39,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:39,291 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:39,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070941729] [2019-10-15 03:04:39,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:39,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:04:39,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:39,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:04:39,425 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:04:39,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611315781] [2019-10-15 03:04:39,510 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:39,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070941729] [2019-10-15 03:04:39,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:04:39,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-15 03:04:39,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271619567] [2019-10-15 03:04:39,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:04:39,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:04:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:39,513 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand 5 states. [2019-10-15 03:04:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:39,596 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2019-10-15 03:04:39,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:39,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-15 03:04:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:39,600 INFO L225 Difference]: With dead ends: 74 [2019-10-15 03:04:39,601 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 03:04:39,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:04:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 03:04:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-15 03:04:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 03:04:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2019-10-15 03:04:39,635 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 24 [2019-10-15 03:04:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:39,635 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2019-10-15 03:04:39,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:04:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2019-10-15 03:04:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:04:39,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:39,642 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:39,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:39,844 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1558903376, now seen corresponding path program 1 times [2019-10-15 03:04:39,845 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:39,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727526438] [2019-10-15 03:04:39,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:39,853 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:39,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627805830] [2019-10-15 03:04:39,854 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 03:04:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:39,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:04:39,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:39,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 03:04:39,971 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 03:04:40,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727526438] [2019-10-15 03:04:40,065 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:40,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627805830] [2019-10-15 03:04:40,066 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:40,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-10-15 03:04:40,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036486177] [2019-10-15 03:04:40,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:40,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:40,075 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 8 states. [2019-10-15 03:04:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:40,267 INFO L93 Difference]: Finished difference Result 170 states and 234 transitions. [2019-10-15 03:04:40,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:04:40,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-10-15 03:04:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:40,270 INFO L225 Difference]: With dead ends: 170 [2019-10-15 03:04:40,271 INFO L226 Difference]: Without dead ends: 73 [2019-10-15 03:04:40,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-15 03:04:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-15 03:04:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 03:04:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2019-10-15 03:04:40,301 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 49 [2019-10-15 03:04:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:40,302 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2019-10-15 03:04:40,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2019-10-15 03:04:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 03:04:40,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:40,306 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:40,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:40,513 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash -250356680, now seen corresponding path program 1 times [2019-10-15 03:04:40,514 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:40,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931721953] [2019-10-15 03:04:40,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:40,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:40,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:40,523 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:40,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358900227] [2019-10-15 03:04:40,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:04:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:40,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 03:04:40,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:40,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 03:04:40,826 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 03:04:41,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931721953] [2019-10-15 03:04:41,107 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:41,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358900227] [2019-10-15 03:04:41,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330748260] [2019-10-15 03:04:41,134 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:04:41,134 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:41,140 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:41,149 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:41,149 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:41,206 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:04:44,485 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:04:47,617 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:04:49,686 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:04:52,364 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:04:56,487 WARN L191 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:04:59,176 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-10-15 03:05:03,867 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-15 03:05:06,564 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-15 03:05:11,101 WARN L191 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:05:13,199 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-15 03:05:16,007 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-15 03:05:18,563 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-15 03:05:20,650 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 27 DAG size of output: 19