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/Problem11_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:44,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:44,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:44,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:44,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:44,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:44,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:44,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:44,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:44,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:44,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:44,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:44,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:44,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:44,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:44,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:44,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:44,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:44,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:44,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:44,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:44,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:44,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:44,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:44,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:03:44,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:03:44,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:03:44,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:03:44,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:03:44,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:03:44,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:44,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:44,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:44,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:44,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:44,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:44,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:44,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:44,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:44,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:44,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:44,292 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 [2019-10-13 20:03:44,306 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:44,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:44,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:44,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:44,308 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:44,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:44,309 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:44,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:44,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:44,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:44,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:44,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:44,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:44,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:44,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:44,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:44,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:44,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:44,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:44,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:44,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:44,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:44,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:44,313 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 [2019-10-13 20:03:44,559 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:44,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:44,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:44,589 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:44,590 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:44,590 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-13 20:03:44,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f874959d6/b704a5705a0d44daa9ac3050af47d719/FLAG59ed235a2 [2019-10-13 20:03:45,310 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:45,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-13 20:03:45,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f874959d6/b704a5705a0d44daa9ac3050af47d719/FLAG59ed235a2 [2019-10-13 20:03:45,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f874959d6/b704a5705a0d44daa9ac3050af47d719 [2019-10-13 20:03:45,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:45,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:45,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:45,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:45,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:45,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:45" (1/1) ... [2019-10-13 20:03:45,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d996306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:45, skipping insertion in model container [2019-10-13 20:03:45,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:45" (1/1) ... [2019-10-13 20:03:45,488 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:45,572 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:46,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:46,282 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:46,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:46,640 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:46,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46 WrapperNode [2019-10-13 20:03:46,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:46,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:46,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:46,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:46,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (1/1) ... [2019-10-13 20:03:46,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:46,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:46,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:46,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:46,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (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 [2019-10-13 20:03:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:48,727 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:48,728 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:48,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:48 BoogieIcfgContainer [2019-10-13 20:03:48,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:48,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:48,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:48,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:48,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:45" (1/3) ... [2019-10-13 20:03:48,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79320910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:48, skipping insertion in model container [2019-10-13 20:03:48,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:46" (2/3) ... [2019-10-13 20:03:48,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79320910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:48, skipping insertion in model container [2019-10-13 20:03:48,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:48" (3/3) ... [2019-10-13 20:03:48,750 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-10-13 20:03:48,763 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:48,774 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:48,788 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:48,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:48,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:48,837 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:48,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:48,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:48,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:48,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:48,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:03:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 20:03:48,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:48,905 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] [2019-10-13 20:03:48,907 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:48,914 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-10-13 20:03:48,924 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:48,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831623459] [2019-10-13 20:03:48,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:48,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:48,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:49,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831623459] [2019-10-13 20:03:49,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:49,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:49,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158194167] [2019-10-13 20:03:49,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:49,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:49,468 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:03:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:51,574 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-13 20:03:51,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:51,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-13 20:03:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:51,596 INFO L225 Difference]: With dead ends: 981 [2019-10-13 20:03:51,597 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 20:03:51,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 20:03:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 20:03:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 20:03:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-13 20:03:51,712 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 72 [2019-10-13 20:03:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:51,713 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-13 20:03:51,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-13 20:03:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 20:03:51,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:51,731 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, 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] [2019-10-13 20:03:51,731 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-10-13 20:03:51,732 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:51,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082549776] [2019-10-13 20:03:51,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:51,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:51,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:51,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082549776] [2019-10-13 20:03:51,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:51,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:51,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242736223] [2019-10-13 20:03:51,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:51,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:51,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:51,982 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-13 20:03:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:54,039 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-10-13 20:03:54,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:54,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-13 20:03:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:54,051 INFO L225 Difference]: With dead ends: 1837 [2019-10-13 20:03:54,051 INFO L226 Difference]: Without dead ends: 1221 [2019-10-13 20:03:54,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:03:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-13 20:03:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-13 20:03:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-13 20:03:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-13 20:03:54,119 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 152 [2019-10-13 20:03:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:54,120 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-13 20:03:54,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-13 20:03:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-13 20:03:54,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:54,125 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, 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] [2019-10-13 20:03:54,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-10-13 20:03:54,126 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:54,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107255955] [2019-10-13 20:03:54,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:54,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:54,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:54,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107255955] [2019-10-13 20:03:54,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765722546] [2019-10-13 20:03:54,556 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 [2019-10-13 20:03:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:54,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:54,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:54,826 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:54,904 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:54,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-13 20:03:54,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722087841] [2019-10-13 20:03:54,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:54,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:03:54,907 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-10-13 20:03:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:56,606 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-10-13 20:03:56,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:56,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 203 [2019-10-13 20:03:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:56,640 INFO L225 Difference]: With dead ends: 4530 [2019-10-13 20:03:56,640 INFO L226 Difference]: Without dead ends: 3326 [2019-10-13 20:03:56,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:03:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-10-13 20:03:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-10-13 20:03:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-13 20:03:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-10-13 20:03:56,769 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 203 [2019-10-13 20:03:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:56,770 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-10-13 20:03:56,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-10-13 20:03:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-13 20:03:56,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:56,782 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:56,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:56,987 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:56,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228476, now seen corresponding path program 1 times [2019-10-13 20:03:56,988 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:56,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853590636] [2019-10-13 20:03:56,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:56,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:56,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 20:03:57,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853590636] [2019-10-13 20:03:57,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284719395] [2019-10-13 20:03:57,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:57,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:03:57,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:57,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:57,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:57,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:57,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:57,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [279901353] [2019-10-13 20:03:57,961 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 285 [2019-10-13 20:03:58,021 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:58,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)