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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:39,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:39,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:39,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:39,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:39,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:39,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:39,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:39,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:39,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:39,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:39,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:39,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:39,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:39,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:39,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:39,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:39,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:39,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:39,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:39,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:39,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:39,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:39,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:39,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:39,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:39,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:39,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:39,827 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 [2019-10-14 23:56:39,861 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:39,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:39,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:39,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:39,867 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:39,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:39,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:39,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:39,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:39,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:39,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:39,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:39,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:39,870 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:39,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:39,871 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:39,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:39,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:39,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:39,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:39,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:39,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:39,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:39,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:39,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:39,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:39,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:39,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:39,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:56:40,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:40,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:40,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:40,182 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:40,182 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:40,183 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label30.c [2019-10-14 23:56:40,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed439f27/2d46f4a7220844429918f659e3d6c38f/FLAGf4618471d [2019-10-14 23:56:40,882 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:40,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label30.c [2019-10-14 23:56:40,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed439f27/2d46f4a7220844429918f659e3d6c38f/FLAGf4618471d [2019-10-14 23:56:41,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed439f27/2d46f4a7220844429918f659e3d6c38f [2019-10-14 23:56:41,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:41,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:41,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:41,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:41,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:41,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337d46e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41, skipping insertion in model container [2019-10-14 23:56:41,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,200 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:41,260 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:41,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:41,815 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:41,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:41,938 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:41,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41 WrapperNode [2019-10-14 23:56:41,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:41,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:41,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:41,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:41,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:42,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:42,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:42,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:42,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (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 [2019-10-14 23:56:42,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:42,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:42,119 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:42,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:42,119 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:42,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:42,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:43,350 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:43,351 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:43,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:43 BoogieIcfgContainer [2019-10-14 23:56:43,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:43,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:43,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:43,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:43,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:41" (1/3) ... [2019-10-14 23:56:43,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b9fba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:43, skipping insertion in model container [2019-10-14 23:56:43,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (2/3) ... [2019-10-14 23:56:43,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b9fba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:43, skipping insertion in model container [2019-10-14 23:56:43,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:43" (3/3) ... [2019-10-14 23:56:43,362 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label30.c [2019-10-14 23:56:43,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:43,386 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:43,399 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:43,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:43,439 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:43,440 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:43,440 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:43,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:43,441 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:43,441 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:43,441 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:56:43,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:43,513 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:43,517 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash -375142418, now seen corresponding path program 1 times [2019-10-14 23:56:43,532 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:43,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63483592] [2019-10-14 23:56:43,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:43,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:43,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:44,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63483592] [2019-10-14 23:56:44,125 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:44,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:44,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129721198] [2019-10-14 23:56:44,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:44,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:44,160 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:45,225 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-10-14 23:56:45,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:45,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-14 23:56:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:45,256 INFO L225 Difference]: With dead ends: 615 [2019-10-14 23:56:45,256 INFO L226 Difference]: Without dead ends: 317 [2019-10-14 23:56:45,267 INFO L600 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 [2019-10-14 23:56:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-10-14 23:56:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-10-14 23:56:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-14 23:56:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-10-14 23:56:45,342 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 134 [2019-10-14 23:56:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:45,344 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-10-14 23:56:45,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-10-14 23:56:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:56:45,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:45,350 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:45,351 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -361589037, now seen corresponding path program 1 times [2019-10-14 23:56:45,354 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:45,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867105216] [2019-10-14 23:56:45,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:45,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:45,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:45,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867105216] [2019-10-14 23:56:45,631 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:45,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:45,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078413643] [2019-10-14 23:56:45,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:45,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:45,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:45,638 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-10-14 23:56:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:46,578 INFO L93 Difference]: Finished difference Result 964 states and 1501 transitions. [2019-10-14 23:56:46,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:56:46,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-14 23:56:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:46,587 INFO L225 Difference]: With dead ends: 964 [2019-10-14 23:56:46,587 INFO L226 Difference]: Without dead ends: 653 [2019-10-14 23:56:46,589 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 [2019-10-14 23:56:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-14 23:56:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 625. [2019-10-14 23:56:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:56:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-10-14 23:56:46,653 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 149 [2019-10-14 23:56:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:46,653 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-10-14 23:56:46,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-10-14 23:56:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 23:56:46,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:46,659 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:46,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash -780527464, now seen corresponding path program 1 times [2019-10-14 23:56:46,660 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:46,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850549267] [2019-10-14 23:56:46,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:56:46,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850549267] [2019-10-14 23:56:46,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901158003] [2019-10-14 23:56:46,823 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 [2019-10-14 23:56:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:46,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:46,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:47,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:47,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1707943172] [2019-10-14 23:56:47,208 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 158 [2019-10-14 23:56:47,292 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:47,293 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)