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/Problem12_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:42,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:42,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:42,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:42,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:42,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:42,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:42,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:42,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:42,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:42,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:42,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:42,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:42,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:42,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:42,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:42,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:42,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:42,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:42,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:42,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:42,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:42,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:42,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:42,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:42,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:42,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:42,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:42,715 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 00:04:42,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:42,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:42,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:42,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:42,739 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:42,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:42,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:42,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:42,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:42,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:42,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:42,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:42,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:42,741 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:42,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:42,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:42,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:42,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:42,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:42,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:42,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:42,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:42,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:42,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:42,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:42,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:42,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:42,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:42,744 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 00:04:43,009 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:43,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:43,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:43,027 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:43,028 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:43,029 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-10-15 00:04:43,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e030f883/efe6d87591664920b8d8dd2078e93ffe/FLAGf1d050f3a [2019-10-15 00:04:43,819 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:43,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-10-15 00:04:43,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e030f883/efe6d87591664920b8d8dd2078e93ffe/FLAGf1d050f3a [2019-10-15 00:04:43,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e030f883/efe6d87591664920b8d8dd2078e93ffe [2019-10-15 00:04:43,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:43,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:43,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:43,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:43,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:43,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:43" (1/1) ... [2019-10-15 00:04:43,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca28fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:43, skipping insertion in model container [2019-10-15 00:04:43,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:43" (1/1) ... [2019-10-15 00:04:43,960 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:44,116 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:46,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:46,049 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:46,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:46,770 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:46,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46 WrapperNode [2019-10-15 00:04:46,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:46,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:46,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:46,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:46,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:46,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:46,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:46,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:46,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:47,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:47,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (1/1) ... [2019-10-15 00:04:47,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:47,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:47,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:47,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:47,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (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 00:04:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:04:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:04:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:04:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:04:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:04:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:04:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:52,481 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:52,482 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:52,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:52 BoogieIcfgContainer [2019-10-15 00:04:52,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:52,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:52,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:52,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:52,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:43" (1/3) ... [2019-10-15 00:04:52,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4487c73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:52, skipping insertion in model container [2019-10-15 00:04:52,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:46" (2/3) ... [2019-10-15 00:04:52,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4487c73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:52, skipping insertion in model container [2019-10-15 00:04:52,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:52" (3/3) ... [2019-10-15 00:04:52,507 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2019-10-15 00:04:52,519 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:52,529 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:52,541 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:52,586 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:52,586 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:52,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:52,586 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:52,586 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:52,587 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:52,587 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:52,587 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-15 00:04:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-15 00:04:52,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:52,631 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 00:04:52,633 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2070539302, now seen corresponding path program 1 times [2019-10-15 00:04:52,649 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:52,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358797421] [2019-10-15 00:04:52,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:52,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:52,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:52,928 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 00:04:52,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358797421] [2019-10-15 00:04:52,929 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:52,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:52,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577783443] [2019-10-15 00:04:52,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:52,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:52,956 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-15 00:04:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:58,595 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-15 00:04:58,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:58,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-15 00:04:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:58,634 INFO L225 Difference]: With dead ends: 2443 [2019-10-15 00:04:58,634 INFO L226 Difference]: Without dead ends: 1542 [2019-10-15 00:04:58,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-15 00:04:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-15 00:04:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-15 00:04:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2852 transitions. [2019-10-15 00:04:58,811 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2852 transitions. Word has length 41 [2019-10-15 00:04:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:58,812 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2852 transitions. [2019-10-15 00:04:58,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2852 transitions. [2019-10-15 00:04:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 00:04:58,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:58,822 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] [2019-10-15 00:04:58,823 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 119524935, now seen corresponding path program 1 times [2019-10-15 00:04:58,825 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:58,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420908686] [2019-10-15 00:04:58,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:59,075 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 00:04:59,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420908686] [2019-10-15 00:04:59,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:59,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:04:59,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891044788] [2019-10-15 00:04:59,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:04:59,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:04:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:04:59,080 INFO L87 Difference]: Start difference. First operand 1542 states and 2852 transitions. Second operand 5 states. [2019-10-15 00:05:05,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:05,756 INFO L93 Difference]: Finished difference Result 4685 states and 8680 transitions. [2019-10-15 00:05:05,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:05:05,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2019-10-15 00:05:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:05,780 INFO L225 Difference]: With dead ends: 4685 [2019-10-15 00:05:05,780 INFO L226 Difference]: Without dead ends: 3149 [2019-10-15 00:05:05,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-10-15 00:05:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3117. [2019-10-15 00:05:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-10-15 00:05:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5119 transitions. [2019-10-15 00:05:05,898 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5119 transitions. Word has length 110 [2019-10-15 00:05:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:05,898 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 5119 transitions. [2019-10-15 00:05:05,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5119 transitions. [2019-10-15 00:05:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:05:05,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:05,902 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] [2019-10-15 00:05:05,902 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1567221619, now seen corresponding path program 1 times [2019-10-15 00:05:05,903 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:05,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680926218] [2019-10-15 00:05:05,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:05,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:05,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:06,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680926218] [2019-10-15 00:05:06,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257779314] [2019-10-15 00:05:06,072 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 00:05:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:06,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:05:06,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:06,296 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 00:05:06,297 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:06,394 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 00:05:06,395 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:05:06,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:05:06,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128496640] [2019-10-15 00:05:06,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:06,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:06,410 INFO L87 Difference]: Start difference. First operand 3117 states and 5119 transitions. Second operand 4 states. [2019-10-15 00:05:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:14,583 INFO L93 Difference]: Finished difference Result 12431 states and 20959 transitions. [2019-10-15 00:05:14,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:14,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-15 00:05:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:14,630 INFO L225 Difference]: With dead ends: 12431 [2019-10-15 00:05:14,631 INFO L226 Difference]: Without dead ends: 9320 [2019-10-15 00:05:14,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9320 states. [2019-10-15 00:05:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9320 to 9320. [2019-10-15 00:05:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2019-10-15 00:05:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 13728 transitions. [2019-10-15 00:05:14,931 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 13728 transitions. Word has length 116 [2019-10-15 00:05:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:14,933 INFO L462 AbstractCegarLoop]: Abstraction has 9320 states and 13728 transitions. [2019-10-15 00:05:14,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 13728 transitions. [2019-10-15 00:05:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:05:14,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:14,943 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] [2019-10-15 00:05:15,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:15,148 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1605374754, now seen corresponding path program 1 times [2019-10-15 00:05:15,149 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:15,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286688818] [2019-10-15 00:05:15,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:15,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:15,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:15,473 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 00:05:15,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286688818] [2019-10-15 00:05:15,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:15,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:15,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490373798] [2019-10-15 00:05:15,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:15,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:15,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:15,477 INFO L87 Difference]: Start difference. First operand 9320 states and 13728 transitions. Second operand 6 states.