/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_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:38:05,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:38:05,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:38:05,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:38:05,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:38:05,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:38:05,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:38:05,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:38:05,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:38:05,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:38:05,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:38:05,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:38:05,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:38:05,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:38:05,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:38:05,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:38:05,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:38:05,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:38:05,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:38:05,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:38:05,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:38:05,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:38:05,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:38:05,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:38:05,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:38:05,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:38:05,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:38:05,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:38:05,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:38:05,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:38:05,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:38:05,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:38:05,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:38:05,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:38:05,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:38:05,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:38:05,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:38:05,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:38:05,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:38:05,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:38:05,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:38:05,644 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 01:38:05,677 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:38:05,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:38:05,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:38:05,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:38:05,682 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:38:05,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:38:05,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:38:05,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:38:05,685 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:38:05,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:38:05,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:38:05,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:38:05,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:38:05,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:38:05,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:38:05,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:38:05,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:38:05,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:38:05,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:38:05,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:38:05,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:38:05,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:38:05,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:38:05,688 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 01:38:05,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:38:05,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:38:05,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:38:05,988 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:38:05,988 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:38:05,989 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-11-07 01:38:06,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d5de4c2/170500e2e4c145fdb6e69065e4490ce9/FLAGe2676c3af [2019-11-07 01:38:06,571 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:38:06,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-11-07 01:38:06,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d5de4c2/170500e2e4c145fdb6e69065e4490ce9/FLAGe2676c3af [2019-11-07 01:38:06,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d5de4c2/170500e2e4c145fdb6e69065e4490ce9 [2019-11-07 01:38:06,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:38:06,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:38:06,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:06,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:38:06,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:38:06,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:06" (1/1) ... [2019-11-07 01:38:06,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120a0594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:06, skipping insertion in model container [2019-11-07 01:38:06,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:06" (1/1) ... [2019-11-07 01:38:06,991 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:38:07,052 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:38:07,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:07,605 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:38:07,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:07,749 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:38:07,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07 WrapperNode [2019-11-07 01:38:07,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:07,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:38:07,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:38:07,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:38:07,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (1/1) ... [2019-11-07 01:38:07,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:38:07,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:38:07,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:38:07,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:38:07,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (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 01:38:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:38:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:38:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:38:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:38:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:38:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:38:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:38:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:38:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:38:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:38:07,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:38:09,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:38:09,801 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:38:09,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:09 BoogieIcfgContainer [2019-11-07 01:38:09,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:38:09,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:38:09,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:38:09,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:38:09,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:38:06" (1/3) ... [2019-11-07 01:38:09,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a546b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:09, skipping insertion in model container [2019-11-07 01:38:09,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:07" (2/3) ... [2019-11-07 01:38:09,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a546b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:09, skipping insertion in model container [2019-11-07 01:38:09,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:09" (3/3) ... [2019-11-07 01:38:09,811 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label14.c [2019-11-07 01:38:09,821 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:38:09,829 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:38:09,840 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:38:09,866 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:38:09,866 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:38:09,866 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:38:09,867 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:38:09,867 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:38:09,867 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:38:09,867 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:38:09,867 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:38:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:38:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:38:09,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:09,898 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 01:38:09,900 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash -219361225, now seen corresponding path program 1 times [2019-11-07 01:38:09,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:09,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273700284] [2019-11-07 01:38:09,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:10,360 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 01:38:10,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273700284] [2019-11-07 01:38:10,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:10,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:10,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150399460] [2019-11-07 01:38:10,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:10,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:10,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:10,389 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:38:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:10,928 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:38:10,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:10,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:38:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:10,954 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:38:10,954 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:38:10,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:38:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:38:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:38:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:38:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:38:11,067 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:38:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:11,068 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:38:11,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:38:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:38:11,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:11,075 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:11,075 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash -701896004, now seen corresponding path program 1 times [2019-11-07 01:38:11,076 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:11,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529595858] [2019-11-07 01:38:11,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:11,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529595858] [2019-11-07 01:38:11,248 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:11,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:11,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492066096] [2019-11-07 01:38:11,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:11,250 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:11,251 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:38:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:11,741 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:38:11,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:11,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:38:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:11,748 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:38:11,748 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:38:11,750 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 01:38:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:38:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-11-07 01:38:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:38:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-11-07 01:38:11,785 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-11-07 01:38:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:11,786 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-11-07 01:38:11,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-11-07 01:38:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 01:38:11,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:11,790 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-07 01:38:11,791 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420168, now seen corresponding path program 1 times [2019-11-07 01:38:11,792 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:11,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843362211] [2019-11-07 01:38:11,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:38:11,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843362211] [2019-11-07 01:38:11,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658780559] [2019-11-07 01:38:11,915 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 01:38:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:12,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:12,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:12,133 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:12,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:38:12,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-07 01:38:12,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425538878] [2019-11-07 01:38:12,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:12,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:38:12,190 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 3 states. [2019-11-07 01:38:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:12,560 INFO L93 Difference]: Finished difference Result 681 states and 1181 transitions. [2019-11-07 01:38:12,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:12,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-11-07 01:38:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:12,567 INFO L225 Difference]: With dead ends: 681 [2019-11-07 01:38:12,567 INFO L226 Difference]: Without dead ends: 679 [2019-11-07 01:38:12,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:38:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-11-07 01:38:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 595. [2019-11-07 01:38:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 01:38:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1031 transitions. [2019-11-07 01:38:12,617 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1031 transitions. Word has length 100 [2019-11-07 01:38:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:12,618 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 1031 transitions. [2019-11-07 01:38:12,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1031 transitions. [2019-11-07 01:38:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:38:12,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:12,624 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2019-11-07 01:38:12,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:38:12,835 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1307299681, now seen corresponding path program 1 times [2019-11-07 01:38:12,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:12,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810076537] [2019-11-07 01:38:12,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:12,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810076537] [2019-11-07 01:38:12,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:12,983 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:12,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195825687] [2019-11-07 01:38:12,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:12,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:12,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:12,986 INFO L87 Difference]: Start difference. First operand 595 states and 1031 transitions. Second operand 6 states. [2019-11-07 01:38:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:13,592 INFO L93 Difference]: Finished difference Result 1223 states and 2179 transitions. [2019-11-07 01:38:13,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:38:13,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:38:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:13,599 INFO L225 Difference]: With dead ends: 1223 [2019-11-07 01:38:13,600 INFO L226 Difference]: Without dead ends: 633 [2019-11-07 01:38:13,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 01:38:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-07 01:38:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 449. [2019-11-07 01:38:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2019-11-07 01:38:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 737 transitions. [2019-11-07 01:38:13,665 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 737 transitions. Word has length 108 [2019-11-07 01:38:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:13,666 INFO L462 AbstractCegarLoop]: Abstraction has 449 states and 737 transitions. [2019-11-07 01:38:13,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 737 transitions. [2019-11-07 01:38:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 01:38:13,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:13,669 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2019-11-07 01:38:13,669 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1860594020, now seen corresponding path program 1 times [2019-11-07 01:38:13,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:13,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138310750] [2019-11-07 01:38:13,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:13,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138310750] [2019-11-07 01:38:13,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698462603] [2019-11-07 01:38:13,772 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 [2019-11-07 01:38:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:13,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:13,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:13,916 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:13,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880768433] [2019-11-07 01:38:14,026 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:14,026 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:14,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:14,040 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:14,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:14,238 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-11-07 01:38:15,490 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-11-07 01:38:16,203 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 01:38:16,382 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2019-11-07 01:38:22,596 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2019-11-07 01:38:23,852 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2019-11-07 01:38:24,206 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2019-11-07 01:38:26,850 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2019-11-07 01:38:27,136 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2019-11-07 01:38:29,045 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2019-11-07 01:38:29,420 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2019-11-07 01:38:37,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:38:37,572 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:38:38,009 WARN L191 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2019-11-07 01:38:38,346 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2019-11-07 01:38:38,896 WARN L191 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 97 [2019-11-07 01:38:39,792 WARN L191 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 101 [2019-11-07 01:38:40,072 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:38:40,299 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:38:40,543 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2019-11-07 01:38:40,859 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2019-11-07 01:38:41,245 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2019-11-07 01:38:41,585 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2019-11-07 01:38:41,963 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77