java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:37,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:37,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:37,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:37,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:37,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:37,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:37,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:37,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:37,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:37,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:37,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:37,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:37,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:37,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:37,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:37,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:37,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:37,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:37,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:37,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:37,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:37,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:37,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:37,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:37,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:37,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:37,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:37,513 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 00:05:37,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:37,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:37,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:37,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:37,540 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:37,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:37,541 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:37,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:37,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:37,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:37,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:37,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:37,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:37,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:37,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:37,543 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:37,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:37,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:37,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:37,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:37,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:37,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:37,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:37,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:37,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:37,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:37,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:37,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:37,545 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 00:05:37,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:37,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:37,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:37,812 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:37,812 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:37,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-15 00:05:37,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2995f650b/f4b36a3b9a1344c5be536752c4bac801/FLAG16a5561fd [2019-10-15 00:05:38,501 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:38,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-15 00:05:38,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2995f650b/f4b36a3b9a1344c5be536752c4bac801/FLAG16a5561fd [2019-10-15 00:05:38,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2995f650b/f4b36a3b9a1344c5be536752c4bac801 [2019-10-15 00:05:38,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:38,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:38,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:38,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:38,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:38,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11574e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38, skipping insertion in model container [2019-10-15 00:05:38,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,834 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:38,904 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:39,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:39,473 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:39,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:39,723 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:39,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39 WrapperNode [2019-10-15 00:05:39,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:39,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:39,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:39,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:39,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2019-10-15 00:05:39,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:39,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:39,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:39,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:39,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (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 00:05:40,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:41,615 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:41,617 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:41,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:41 BoogieIcfgContainer [2019-10-15 00:05:41,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:41,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:41,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:41,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:41,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:38" (1/3) ... [2019-10-15 00:05:41,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440c0204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:41, skipping insertion in model container [2019-10-15 00:05:41,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (2/3) ... [2019-10-15 00:05:41,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440c0204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:41, skipping insertion in model container [2019-10-15 00:05:41,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:41" (3/3) ... [2019-10-15 00:05:41,627 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-10-15 00:05:41,638 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:41,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:41,660 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:41,688 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:41,688 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:41,688 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:41,688 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:41,688 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:41,689 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:41,689 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:41,689 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:05:41,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:41,727 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] [2019-10-15 00:05:41,729 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-10-15 00:05:41,745 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:41,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250200611] [2019-10-15 00:05:41,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:41,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:41,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:42,049 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 00:05:42,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250200611] [2019-10-15 00:05:42,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:42,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:42,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108766963] [2019-10-15 00:05:42,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:42,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:42,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:42,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:42,078 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:05:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:43,387 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:05:43,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:43,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-15 00:05:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:43,410 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:05:43,411 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:05:43,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:05:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:05:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:05:43,568 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 71 [2019-10-15 00:05:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:43,570 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:05:43,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:05:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 00:05:43,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:43,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:43,588 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-10-15 00:05:43,591 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:43,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257703069] [2019-10-15 00:05:43,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:43,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:43,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:43,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257703069] [2019-10-15 00:05:43,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:43,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:43,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723093057] [2019-10-15 00:05:43,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:43,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:43,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:43,919 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:05:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:45,401 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-15 00:05:45,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:45,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-15 00:05:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:45,408 INFO L225 Difference]: With dead ends: 1122 [2019-10-15 00:05:45,409 INFO L226 Difference]: Without dead ends: 756 [2019-10-15 00:05:45,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-15 00:05:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-15 00:05:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-15 00:05:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-15 00:05:45,452 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 140 [2019-10-15 00:05:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:45,453 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-15 00:05:45,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-15 00:05:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:05:45,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:45,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:45,457 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-10-15 00:05:45,457 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:45,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696297060] [2019-10-15 00:05:45,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:45,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:45,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:45,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696297060] [2019-10-15 00:05:45,602 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:45,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:45,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503803101] [2019-10-15 00:05:45,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:45,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:45,606 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-15 00:05:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:46,889 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-15 00:05:46,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:46,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-15 00:05:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:46,904 INFO L225 Difference]: With dead ends: 1904 [2019-10-15 00:05:46,904 INFO L226 Difference]: Without dead ends: 1158 [2019-10-15 00:05:46,908 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 [2019-10-15 00:05:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-15 00:05:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-15 00:05:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-15 00:05:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-15 00:05:46,999 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 141 [2019-10-15 00:05:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:47,003 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-15 00:05:47,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-15 00:05:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 00:05:47,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:47,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:47,008 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-10-15 00:05:47,009 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:47,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922635636] [2019-10-15 00:05:47,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:47,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:47,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:47,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922635636] [2019-10-15 00:05:47,201 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:47,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:47,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712255030] [2019-10-15 00:05:47,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:47,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:47,203 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-15 00:05:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:48,342 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-10-15 00:05:48,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:48,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-15 00:05:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:48,359 INFO L225 Difference]: With dead ends: 2880 [2019-10-15 00:05:48,359 INFO L226 Difference]: Without dead ends: 1748 [2019-10-15 00:05:48,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-15 00:05:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-15 00:05:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-15 00:05:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-15 00:05:48,459 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 143 [2019-10-15 00:05:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:48,460 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-15 00:05:48,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-15 00:05:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-15 00:05:48,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:48,466 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, 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] [2019-10-15 00:05:48,467 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-10-15 00:05:48,467 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:48,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851685617] [2019-10-15 00:05:48,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:48,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:48,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:05:48,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851685617] [2019-10-15 00:05:48,695 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:48,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:48,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197896893] [2019-10-15 00:05:48,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:48,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:48,697 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-15 00:05:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:50,094 INFO L93 Difference]: Finished difference Result 4126 states and 5834 transitions. [2019-10-15 00:05:50,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:50,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-10-15 00:05:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:50,113 INFO L225 Difference]: With dead ends: 4126 [2019-10-15 00:05:50,113 INFO L226 Difference]: Without dead ends: 2806 [2019-10-15 00:05:50,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-10-15 00:05:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-10-15 00:05:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-15 00:05:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-10-15 00:05:50,189 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 227 [2019-10-15 00:05:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:50,190 INFO L462 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-10-15 00:05:50,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-10-15 00:05:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-15 00:05:50,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:50,201 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, 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] [2019-10-15 00:05:50,201 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-10-15 00:05:50,202 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:50,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204993114] [2019-10-15 00:05:50,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:50,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:50,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204993114] [2019-10-15 00:05:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904147764] [2019-10-15 00:05:50,579 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 00:05:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:50,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:05:50,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:50,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 00:05:50,989 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:51,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 128 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:51,733 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:51,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:05:51,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678482359] [2019-10-15 00:05:51,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:51,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:05:51,737 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 5 states. [2019-10-15 00:05:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:53,380 INFO L93 Difference]: Finished difference Result 4360 states and 5977 transitions. [2019-10-15 00:05:53,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:53,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-10-15 00:05:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:53,397 INFO L225 Difference]: With dead ends: 4360 [2019-10-15 00:05:53,397 INFO L226 Difference]: Without dead ends: 2290 [2019-10-15 00:05:53,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:05:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-10-15 00:05:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2270. [2019-10-15 00:05:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2019-10-15 00:05:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3040 transitions. [2019-10-15 00:05:53,522 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3040 transitions. Word has length 336 [2019-10-15 00:05:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:53,522 INFO L462 AbstractCegarLoop]: Abstraction has 2270 states and 3040 transitions. [2019-10-15 00:05:53,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3040 transitions. [2019-10-15 00:05:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-10-15 00:05:53,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:53,536 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:53,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:53,741 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-10-15 00:05:53,743 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:53,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636046381] [2019-10-15 00:05:53,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:53,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:53,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 278 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:54,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636046381] [2019-10-15 00:05:54,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083336415] [2019-10-15 00:05:54,609 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 [2019-10-15 00:05:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:54,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:05:54,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:54,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 354 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 00:05:55,106 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:55,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 200 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:55,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1992829958] [2019-10-15 00:05:55,696 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 421 [2019-10-15 00:05:55,750 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:55,751 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:18,915 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:18,918 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 607 root evaluator evaluations with a maximum evaluation depth of 14. Performed 607 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:06:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:18,922 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates