/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:39:26,566 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:39:26,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:39:26,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:39:26,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:39:26,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:39:26,664 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:39:26,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:39:26,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:39:26,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:39:26,667 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:39:26,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:39:26,669 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:39:26,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:39:26,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:39:26,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:39:26,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:39:26,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:39:26,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:39:26,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:39:26,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:39:26,671 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:39:26,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:39:26,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:39:26,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:39:26,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:39:26,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:39:26,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:39:26,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:39:26,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:39:26,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:39:26,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:39:26,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:39:26,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:39:26,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:39:26,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:39:26,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:39:27,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:39:27,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:39:27,003 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:39:27,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2019-11-07 01:39:27,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fcac786/963d44089be940fca146e10124650198/FLAG96c59c262 [2019-11-07 01:39:27,681 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:39:27,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2019-11-07 01:39:27,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fcac786/963d44089be940fca146e10124650198/FLAG96c59c262 [2019-11-07 01:39:27,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fcac786/963d44089be940fca146e10124650198 [2019-11-07 01:39:27,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:39:27,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:39:27,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:27,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:39:27,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:39:27,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:27" (1/1) ... [2019-11-07 01:39:27,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b768130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:27, skipping insertion in model container [2019-11-07 01:39:27,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:27" (1/1) ... [2019-11-07 01:39:27,957 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:39:28,021 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:39:28,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:28,409 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:39:28,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:28,720 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:39:28,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28 WrapperNode [2019-11-07 01:39:28,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:28,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:39:28,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:39:28,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:39:28,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... [2019-11-07 01:39:28,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:39:28,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:39:28,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:39:28,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:39:28,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:39:28,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:39:28,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:39:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:39:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:39:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:39:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:39:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:39:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:39:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:39:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:39:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:39:30,961 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:39:30,962 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:39:30,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:30 BoogieIcfgContainer [2019-11-07 01:39:30,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:39:30,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:39:30,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:39:30,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:39:30,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:27" (1/3) ... [2019-11-07 01:39:30,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5369e071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:30, skipping insertion in model container [2019-11-07 01:39:30,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:28" (2/3) ... [2019-11-07 01:39:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5369e071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:30, skipping insertion in model container [2019-11-07 01:39:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:30" (3/3) ... [2019-11-07 01:39:30,980 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label36.c [2019-11-07 01:39:30,990 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:39:30,998 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:39:31,010 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:39:31,036 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:39:31,036 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:39:31,036 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:39:31,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:39:31,037 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:39:31,037 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:39:31,037 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:39:31,037 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:39:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:39:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:39:31,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:31,069 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:31,071 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:31,078 INFO L82 PathProgramCache]: Analyzing trace with hash -219357385, now seen corresponding path program 1 times [2019-11-07 01:39:31,088 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:31,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515768968] [2019-11-07 01:39:31,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:31,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515768968] [2019-11-07 01:39:31,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:31,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:31,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235256341] [2019-11-07 01:39:31,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:31,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:31,637 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:39:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:32,136 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:39:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:32,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:39:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:32,154 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:39:32,155 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:39:32,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:39:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:39:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:39:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:39:32,226 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:39:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:32,227 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:39:32,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:39:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:39:32,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:32,233 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:32,234 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1874052722, now seen corresponding path program 1 times [2019-11-07 01:39:32,235 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:32,235 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910467205] [2019-11-07 01:39:32,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:32,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910467205] [2019-11-07 01:39:32,401 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:32,401 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:39:32,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565430242] [2019-11-07 01:39:32,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:39:32,404 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:39:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:39:32,405 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:39:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:33,078 INFO L93 Difference]: Finished difference Result 549 states and 1065 transitions. [2019-11-07 01:39:33,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:39:33,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:39:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:33,085 INFO L225 Difference]: With dead ends: 549 [2019-11-07 01:39:33,085 INFO L226 Difference]: Without dead ends: 379 [2019-11-07 01:39:33,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:39:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-11-07 01:39:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 355. [2019-11-07 01:39:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:39:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-11-07 01:39:33,162 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-11-07 01:39:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:33,164 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-11-07 01:39:33,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:39:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-11-07 01:39:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:39:33,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:33,177 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:33,178 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash 750789737, now seen corresponding path program 1 times [2019-11-07 01:39:33,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:33,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88376333] [2019-11-07 01:39:33,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:39:33,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88376333] [2019-11-07 01:39:33,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173073638] [2019-11-07 01:39:33,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:39:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:33,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:39:33,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:33,567 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:33,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255182133] [2019-11-07 01:39:33,696 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:39:33,696 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:39:33,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:39:33,710 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:39:33,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:39:33,860 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:39:35,094 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 150 [2019-11-07 01:39:35,215 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:39:35,835 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-07 01:39:42,416 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2019-11-07 01:39:42,932 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 30144 conjuctions. This might take some time... [2019-11-07 01:39:44,573 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2019-11-07 01:39:45,252 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 30144 conjuctions. This might take some time... [2019-11-07 01:39:47,187 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2019-11-07 01:39:47,779 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 30144 conjuctions. This might take some time... [2019-11-07 01:39:53,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:39:53,627 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:39:54,023 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:39:55,070 WARN L191 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 99 [2019-11-07 01:39:56,009 WARN L191 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-11-07 01:39:56,318 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:39:56,558 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:39:56,816 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:39:57,156 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2019-11-07 01:39:57,517 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2019-11-07 01:39:57,858 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:39:58,247 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-11-07 01:40:03,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:40:03,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 5, 5] total 22 [2019-11-07 01:40:03,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106526856] [2019-11-07 01:40:03,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 01:40:03,546 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 01:40:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:40:03,547 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 14 states. [2019-11-07 01:40:03,745 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:40:04,273 WARN L191 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2019-11-07 01:40:05,061 WARN L191 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 116 [2019-11-07 01:40:05,799 WARN L191 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 107 [2019-11-07 01:40:06,132 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-07 01:40:06,484 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93