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/Problem01_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:19,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:19,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:19,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:19,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:19,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:19,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:19,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:19,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:19,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:19,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:19,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:19,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:19,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:19,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:19,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:19,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:19,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:19,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:19,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:19,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:19,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:19,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:19,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:19,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:19,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:19,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:19,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:19,754 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 23:54:19,770 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:19,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:19,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:19,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:19,772 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:19,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:19,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:19,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:19,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:19,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:19,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:19,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:19,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:19,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:19,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:19,775 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:19,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:19,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:19,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:19,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:19,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:19,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:19,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:19,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:19,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:19,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:19,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:19,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:19,777 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 23:54:20,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:20,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:20,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:20,067 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:20,067 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:20,068 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-10-14 23:54:20,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6825e0287/2ae0e39879b6459bb8f9616f393aaa8a/FLAG64f3e34b4 [2019-10-14 23:54:20,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:20,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-10-14 23:54:20,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6825e0287/2ae0e39879b6459bb8f9616f393aaa8a/FLAG64f3e34b4 [2019-10-14 23:54:21,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6825e0287/2ae0e39879b6459bb8f9616f393aaa8a [2019-10-14 23:54:21,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:21,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:21,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:21,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:21,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:21,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7757f965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21, skipping insertion in model container [2019-10-14 23:54:21,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,065 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:21,121 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:21,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:21,654 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:21,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:21,815 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:21,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21 WrapperNode [2019-10-14 23:54:21,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:21,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:21,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:21,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:21,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (1/1) ... [2019-10-14 23:54:21,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:21,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:21,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:21,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:21,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (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 23:54:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:23,182 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:23,182 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:23,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:23 BoogieIcfgContainer [2019-10-14 23:54:23,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:23,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:23,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:23,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:23,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:21" (1/3) ... [2019-10-14 23:54:23,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e969c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:23, skipping insertion in model container [2019-10-14 23:54:23,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:21" (2/3) ... [2019-10-14 23:54:23,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e969c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:23, skipping insertion in model container [2019-10-14 23:54:23,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:23" (3/3) ... [2019-10-14 23:54:23,193 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label40.c [2019-10-14 23:54:23,205 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:23,214 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:23,226 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:23,254 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:23,255 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:23,255 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:23,255 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:23,255 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:23,256 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:23,256 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:23,256 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 23:54:23,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:23,293 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] [2019-10-14 23:54:23,294 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 900807719, now seen corresponding path program 1 times [2019-10-14 23:54:23,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:23,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714136860] [2019-10-14 23:54:23,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:23,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:23,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:23,779 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 23:54:23,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714136860] [2019-10-14 23:54:23,781 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:23,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:23,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472468552] [2019-10-14 23:54:23,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:23,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:23,810 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:24,662 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:24,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:24,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2019-10-14 23:54:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:24,692 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:24,692 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:24,704 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 23:54:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-14 23:54:24,777 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 93 [2019-10-14 23:54:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:24,778 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-14 23:54:24,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-14 23:54:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:54:24,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:24,784 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:24,784 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash 33868842, now seen corresponding path program 1 times [2019-10-14 23:54:24,785 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:24,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173564977] [2019-10-14 23:54:24,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:24,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:24,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:24,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173564977] [2019-10-14 23:54:24,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:24,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:54:24,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334204400] [2019-10-14 23:54:24,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:54:24,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:54:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:54:24,922 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-10-14 23:54:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:25,664 INFO L93 Difference]: Finished difference Result 840 states and 1253 transitions. [2019-10-14 23:54:25,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:25,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2019-10-14 23:54:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:25,672 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:54:25,672 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:54:25,674 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 [2019-10-14 23:54:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:54:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-10-14 23:54:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 23:54:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 787 transitions. [2019-10-14 23:54:25,723 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 787 transitions. Word has length 102 [2019-10-14 23:54:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:25,723 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 787 transitions. [2019-10-14 23:54:25,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:54:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 787 transitions. [2019-10-14 23:54:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 23:54:25,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:25,732 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:54:25,733 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2021749471, now seen corresponding path program 1 times [2019-10-14 23:54:25,734 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:25,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843866306] [2019-10-14 23:54:25,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:25,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:25,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:25,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843866306] [2019-10-14 23:54:25,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895149634] [2019-10-14 23:54:25,901 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 23:54:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:26,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:54:26,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:26,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:26,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [127840590] [2019-10-14 23:54:26,190 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 128 [2019-10-14 23:54:26,268 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:26,269 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)