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/Problem14_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:41,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:41,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:41,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:06:41,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:41,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:41,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:41,857 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 00:06:41,870 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:41,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:41,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:41,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:41,872 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:41,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:41,872 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:41,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:41,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:41,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:41,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:41,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:41,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:41,874 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:41,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:41,874 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:41,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:41,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:41,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:41,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:41,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:41,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:41,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:41,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:41,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:41,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:41,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:41,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:41,877 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 [2019-10-15 00:06:42,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:42,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:42,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:42,187 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:42,187 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:42,188 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-10-15 00:06:42,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05374ee50/cac50becca844513945d6d0cb18c34bd/FLAGedaa27767 [2019-10-15 00:06:42,795 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:42,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-10-15 00:06:42,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05374ee50/cac50becca844513945d6d0cb18c34bd/FLAGedaa27767 [2019-10-15 00:06:43,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05374ee50/cac50becca844513945d6d0cb18c34bd [2019-10-15 00:06:43,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:43,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:43,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:43,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:43,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:43,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:43,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2e1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43, skipping insertion in model container [2019-10-15 00:06:43,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:43,061 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:43,114 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:43,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:43,656 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:43,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:43,926 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:43,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43 WrapperNode [2019-10-15 00:06:43,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:43,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:43,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:43,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:43,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:43,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:43,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:43,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:44,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:44,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:44,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (1/1) ... [2019-10-15 00:06:44,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:44,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:44,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:44,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:44,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (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 00:06:44,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:44,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:44,222 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:44,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:45,710 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:45,711 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:45,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:45 BoogieIcfgContainer [2019-10-15 00:06:45,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:45,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:45,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:45,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:45,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:43" (1/3) ... [2019-10-15 00:06:45,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3250b3a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:45, skipping insertion in model container [2019-10-15 00:06:45,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:43" (2/3) ... [2019-10-15 00:06:45,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3250b3a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:45, skipping insertion in model container [2019-10-15 00:06:45,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:45" (3/3) ... [2019-10-15 00:06:45,722 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label51.c [2019-10-15 00:06:45,733 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:45,743 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:45,756 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:45,802 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:45,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:45,802 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:45,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:45,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:45,803 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:45,803 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:45,803 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-15 00:06:45,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:45,846 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] [2019-10-15 00:06:45,848 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1352567654, now seen corresponding path program 1 times [2019-10-15 00:06:45,868 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:45,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518517772] [2019-10-15 00:06:45,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:45,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:45,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:46,153 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 00:06:46,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518517772] [2019-10-15 00:06:46,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:46,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:46,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474316946] [2019-10-15 00:06:46,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:46,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:46,179 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:06:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:47,478 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:06:47,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:06:47,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-15 00:06:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:47,515 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:06:47,515 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:06:47,528 INFO L600 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 [2019-10-15 00:06:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:06:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:06:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions. [2019-10-15 00:06:47,604 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 41 [2019-10-15 00:06:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:47,604 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 596 transitions. [2019-10-15 00:06:47,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:06:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions. [2019-10-15 00:06:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 00:06:47,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:47,611 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 00:06:47,611 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1876604734, now seen corresponding path program 1 times [2019-10-15 00:06:47,612 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:47,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707349323] [2019-10-15 00:06:47,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:47,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:47,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:47,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707349323] [2019-10-15 00:06:47,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:47,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:06:47,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302748553] [2019-10-15 00:06:47,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:06:47,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:06:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:06:47,853 INFO L87 Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states. [2019-10-15 00:06:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:49,276 INFO L93 Difference]: Finished difference Result 940 states and 1514 transitions. [2019-10-15 00:06:49,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:06:49,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-10-15 00:06:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:49,281 INFO L225 Difference]: With dead ends: 940 [2019-10-15 00:06:49,281 INFO L226 Difference]: Without dead ends: 574 [2019-10-15 00:06:49,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 00:06:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-10-15 00:06:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2019-10-15 00:06:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-15 00:06:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions. [2019-10-15 00:06:49,328 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 117 [2019-10-15 00:06:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:49,328 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 831 transitions. [2019-10-15 00:06:49,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:06:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions. [2019-10-15 00:06:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 00:06:49,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:49,339 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:49,339 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1520330050, now seen corresponding path program 1 times [2019-10-15 00:06:49,340 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:49,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988229024] [2019-10-15 00:06:49,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:49,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:49,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:49,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988229024] [2019-10-15 00:06:49,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:49,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:49,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354594005] [2019-10-15 00:06:49,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:49,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:49,619 INFO L87 Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states. [2019-10-15 00:06:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:50,968 INFO L93 Difference]: Finished difference Result 1526 states and 2378 transitions. [2019-10-15 00:06:50,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:50,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2019-10-15 00:06:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:50,983 INFO L225 Difference]: With dead ends: 1526 [2019-10-15 00:06:50,984 INFO L226 Difference]: Without dead ends: 968 [2019-10-15 00:06:50,986 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 00:06:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-10-15 00:06:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942. [2019-10-15 00:06:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-15 00:06:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions. [2019-10-15 00:06:51,054 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 181 [2019-10-15 00:06:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:51,055 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions. [2019-10-15 00:06:51,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions. [2019-10-15 00:06:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 00:06:51,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:51,068 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:06:51,071 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -906348779, now seen corresponding path program 1 times [2019-10-15 00:06:51,072 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:51,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574872292] [2019-10-15 00:06:51,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:51,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:51,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:51,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574872292] [2019-10-15 00:06:51,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323939639] [2019-10-15 00:06:51,359 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 00:06:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:51,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:06:51,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:51,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:51,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [806881636] [2019-10-15 00:06:51,886 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-10-15 00:06:51,945 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:51,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:56,166 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:56,168 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:06:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:56,173 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:59,551 INFO L227 lantSequenceWeakener]: Weakened 181 states. On average, predicates are now at 78.01% of their original sizes. [2019-10-15 00:06:59,551 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:59,627 INFO L553 sIntCurrentIteration]: We unified 199 AI predicates to 199 [2019-10-15 00:06:59,628 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:59,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:59,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-15 00:06:59,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344872505] [2019-10-15 00:06:59,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:06:59,631 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:59,631 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:06:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:06:59,632 INFO L87 Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states.