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/Problem16_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:19,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:19,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:19,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:55:19,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:19,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:19,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:19,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:19,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:19,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:19,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:19,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:19,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:19,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:19,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:19,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:19,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:55:19,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:19,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:19,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:19,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:55:19,806 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:19,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:19,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:19,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:19,808 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:19,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:19,808 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:19,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:19,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:19,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:19,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:19,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:19,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:19,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:19,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:19,810 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:19,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:19,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:19,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:19,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:19,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:19,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:19,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:19,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:19,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:19,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:19,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:19,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:19,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:55:20,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:20,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:20,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:20,107 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:20,107 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:20,108 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-15 01:55:20,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6070b47d/caf936b49c4b4dba903870fd971f5c6f/FLAG31e860dbe [2019-10-15 01:55:20,888 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:20,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-15 01:55:20,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6070b47d/caf936b49c4b4dba903870fd971f5c6f/FLAG31e860dbe [2019-10-15 01:55:21,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6070b47d/caf936b49c4b4dba903870fd971f5c6f [2019-10-15 01:55:21,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:21,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:21,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:21,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:21,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:21,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:21" (1/1) ... [2019-10-15 01:55:21,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f82b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:21, skipping insertion in model container [2019-10-15 01:55:21,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:21" (1/1) ... [2019-10-15 01:55:21,087 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:21,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:22,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:22,238 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:22,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:22,577 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:22,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22 WrapperNode [2019-10-15 01:55:22,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:22,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:22,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:22,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:22,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... [2019-10-15 01:55:22,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:22,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:22,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:22,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:22,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:22,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:22,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:22,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:22,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:22,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:39,993 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:39,993 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:39,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:39 BoogieIcfgContainer [2019-10-15 01:55:39,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:39,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:39,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:39,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:40,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:21" (1/3) ... [2019-10-15 01:55:40,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368d9abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:40, skipping insertion in model container [2019-10-15 01:55:40,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:22" (2/3) ... [2019-10-15 01:55:40,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368d9abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:40, skipping insertion in model container [2019-10-15 01:55:40,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:39" (3/3) ... [2019-10-15 01:55:40,005 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2019-10-15 01:55:40,016 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:40,026 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:40,037 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:40,080 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:40,080 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:40,081 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:40,081 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:40,081 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:40,081 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:40,081 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:40,081 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:40,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:40,125 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:40,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 863564863, now seen corresponding path program 1 times [2019-10-15 01:55:40,145 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:40,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454842955] [2019-10-15 01:55:40,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:40,146 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:40,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:40,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454842955] [2019-10-15 01:55:40,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:40,468 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:55:40,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554343203] [2019-10-15 01:55:40,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:55:40,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:55:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:55:40,491 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:55:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:42,340 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:55:42,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:55:42,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:55:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:42,376 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:55:42,377 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:55:42,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:55:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:55:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2019-10-15 01:55:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-10-15 01:55:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2019-10-15 01:55:42,492 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2019-10-15 01:55:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:42,493 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2019-10-15 01:55:42,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:55:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2019-10-15 01:55:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:55:42,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:42,495 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:42,495 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash 76450537, now seen corresponding path program 1 times [2019-10-15 01:55:42,496 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:42,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433188491] [2019-10-15 01:55:42,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:42,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433188491] [2019-10-15 01:55:42,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:42,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:42,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172035353] [2019-10-15 01:55:42,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:42,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:42,632 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand 5 states. [2019-10-15 01:55:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:46,928 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2019-10-15 01:55:46,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:46,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-15 01:55:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:46,940 INFO L225 Difference]: With dead ends: 1387 [2019-10-15 01:55:46,940 INFO L226 Difference]: Without dead ends: 931 [2019-10-15 01:55:46,946 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-10-15 01:55:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2019-10-15 01:55:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-10-15 01:55:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2019-10-15 01:55:47,004 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2019-10-15 01:55:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:47,005 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2019-10-15 01:55:47,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2019-10-15 01:55:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 01:55:47,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:47,008 INFO L380 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] [2019-10-15 01:55:47,009 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2007878310, now seen corresponding path program 1 times [2019-10-15 01:55:47,010 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:47,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518690655] [2019-10-15 01:55:47,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:47,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:47,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:55:47,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518690655] [2019-10-15 01:55:47,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873585940] [2019-10-15 01:55:47,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:47,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:47,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:47,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:47,367 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:55:47,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 01:55:47,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224264828] [2019-10-15 01:55:47,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:47,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:47,370 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand 4 states. [2019-10-15 01:55:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:50,892 INFO L93 Difference]: Finished difference Result 3199 states and 5284 transitions. [2019-10-15 01:55:50,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:50,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-10-15 01:55:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:50,908 INFO L225 Difference]: With dead ends: 3199 [2019-10-15 01:55:50,909 INFO L226 Difference]: Without dead ends: 2281 [2019-10-15 01:55:50,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2019-10-15 01:55:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1383. [2019-10-15 01:55:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2019-10-15 01:55:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2349 transitions. [2019-10-15 01:55:50,970 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2349 transitions. Word has length 52 [2019-10-15 01:55:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:50,971 INFO L462 AbstractCegarLoop]: Abstraction has 1383 states and 2349 transitions. [2019-10-15 01:55:50,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2349 transitions. [2019-10-15 01:55:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:55:50,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:50,974 INFO L380 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] [2019-10-15 01:55:51,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:51,186 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2075711313, now seen corresponding path program 1 times [2019-10-15 01:55:51,187 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:51,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029372212] [2019-10-15 01:55:51,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:51,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:51,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:51,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029372212] [2019-10-15 01:55:51,305 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:51,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:55:51,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588228536] [2019-10-15 01:55:51,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:55:51,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:55:51,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:51,307 INFO L87 Difference]: Start difference. First operand 1383 states and 2349 transitions. Second operand 6 states. [2019-10-15 01:55:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:53,557 INFO L93 Difference]: Finished difference Result 3470 states and 5914 transitions. [2019-10-15 01:55:53,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:53,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2019-10-15 01:55:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:53,579 INFO L225 Difference]: With dead ends: 3470 [2019-10-15 01:55:53,579 INFO L226 Difference]: Without dead ends: 2092 [2019-10-15 01:55:53,586 INFO L600 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 [2019-10-15 01:55:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2019-10-15 01:55:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 2053. [2019-10-15 01:55:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2019-10-15 01:55:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3141 transitions. [2019-10-15 01:55:53,716 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3141 transitions. Word has length 67 [2019-10-15 01:55:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:53,720 INFO L462 AbstractCegarLoop]: Abstraction has 2053 states and 3141 transitions. [2019-10-15 01:55:53,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3141 transitions. [2019-10-15 01:55:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 01:55:53,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:53,734 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:55:53,735 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1007646247, now seen corresponding path program 1 times [2019-10-15 01:55:53,738 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:53,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494405119] [2019-10-15 01:55:53,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:53,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:53,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:54,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494405119] [2019-10-15 01:55:54,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544687802] [2019-10-15 01:55:54,019 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 01:55:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:54,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:54,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:54,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:54,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338078031] [2019-10-15 01:55:54,375 INFO L162 IcfgInterpreter]: Started Sifa with 77 locations of interest [2019-10-15 01:55:54,376 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:54,382 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:54,401 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:54,403 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:54,559 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-10-15 01:55:54,698 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:55:54,934 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:55:55,191 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:55:55,224 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:55:56,287 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-10-15 01:55:56,378 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43