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/Problem15_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:42,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:42,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:42,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:42,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:42,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:42,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:42,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:42,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:42,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:42,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:42,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:42,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:42,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:42,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:42,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:42,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:42,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:42,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:42,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:42,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:42,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:42,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:42,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:42,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:42,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:42,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:42,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:42,601 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 00:07:42,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:42,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:42,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:42,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:42,623 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:42,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:42,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:42,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:42,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:42,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:42,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:42,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:42,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:42,626 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:42,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:42,626 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:42,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:42,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:42,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:42,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:42,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:42,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:42,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:42,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:42,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:42,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:42,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:42,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:42,629 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 00:07:42,981 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:42,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:43,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:43,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:43,003 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:43,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-10-15 00:07:43,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea370fd51/fa704f073d9d4afca6f9a4581a0d11df/FLAGe65123d2b [2019-10-15 00:07:43,733 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:43,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-10-15 00:07:43,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea370fd51/fa704f073d9d4afca6f9a4581a0d11df/FLAGe65123d2b [2019-10-15 00:07:43,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea370fd51/fa704f073d9d4afca6f9a4581a0d11df [2019-10-15 00:07:43,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:43,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:43,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:43,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:43,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:43,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:43" (1/1) ... [2019-10-15 00:07:43,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a8eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:43, skipping insertion in model container [2019-10-15 00:07:43,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:43" (1/1) ... [2019-10-15 00:07:43,939 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:44,025 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:44,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:44,947 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:45,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:45,498 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:45,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45 WrapperNode [2019-10-15 00:07:45,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:45,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:45,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:45,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:45,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (1/1) ... [2019-10-15 00:07:45,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:45,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:45,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:45,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:45,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (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 00:07:45,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:45,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:45,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:45,827 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:45,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:50,076 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:50,077 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:50,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:50 BoogieIcfgContainer [2019-10-15 00:07:50,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:50,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:50,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:50,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:50,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:43" (1/3) ... [2019-10-15 00:07:50,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676e01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:50, skipping insertion in model container [2019-10-15 00:07:50,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:45" (2/3) ... [2019-10-15 00:07:50,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676e01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:50, skipping insertion in model container [2019-10-15 00:07:50,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:50" (3/3) ... [2019-10-15 00:07:50,087 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2019-10-15 00:07:50,098 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:50,107 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:50,120 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:50,154 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:50,154 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:50,155 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:50,155 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:50,155 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:50,155 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:50,155 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:50,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 00:07:50,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:50,197 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] [2019-10-15 00:07:50,199 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1661413296, now seen corresponding path program 1 times [2019-10-15 00:07:50,216 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:50,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861296668] [2019-10-15 00:07:50,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:50,627 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 00:07:50,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861296668] [2019-10-15 00:07:50,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:50,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:50,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179065097] [2019-10-15 00:07:50,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:50,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:50,658 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:55,251 INFO L93 Difference]: Finished difference Result 1546 states and 2831 transitions. [2019-10-15 00:07:55,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:55,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2019-10-15 00:07:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:55,277 INFO L225 Difference]: With dead ends: 1546 [2019-10-15 00:07:55,278 INFO L226 Difference]: Without dead ends: 1028 [2019-10-15 00:07:55,290 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 [2019-10-15 00:07:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-15 00:07:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-10-15 00:07:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-15 00:07:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-10-15 00:07:55,394 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 58 [2019-10-15 00:07:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:55,395 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-10-15 00:07:55,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-10-15 00:07:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 00:07:55,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:55,402 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, 1, 1, 1, 1, 1, 1, 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 00:07:55,403 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1221807989, now seen corresponding path program 1 times [2019-10-15 00:07:55,403 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:55,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765995697] [2019-10-15 00:07:55,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:55,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:55,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:55,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765995697] [2019-10-15 00:07:55,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:55,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:55,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772052359] [2019-10-15 00:07:55,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:55,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:55,595 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-10-15 00:08:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:01,069 INFO L93 Difference]: Finished difference Result 2057 states and 3297 transitions. [2019-10-15 00:08:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:08:01,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-15 00:08:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:01,087 INFO L225 Difference]: With dead ends: 2057 [2019-10-15 00:08:01,087 INFO L226 Difference]: Without dead ends: 1363 [2019-10-15 00:08:01,091 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 00:08:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-15 00:08:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-10-15 00:08:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-15 00:08:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-10-15 00:08:01,143 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 130 [2019-10-15 00:08:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:01,144 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-10-15 00:08:01,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-10-15 00:08:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 00:08:01,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:01,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:01,147 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -78025861, now seen corresponding path program 1 times [2019-10-15 00:08:01,148 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:01,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335610565] [2019-10-15 00:08:01,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:01,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:01,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:01,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335610565] [2019-10-15 00:08:01,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:01,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:01,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776441026] [2019-10-15 00:08:01,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:01,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:01,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:01,339 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 4 states. [2019-10-15 00:08:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:05,880 INFO L93 Difference]: Finished difference Result 5149 states and 7300 transitions. [2019-10-15 00:08:05,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:05,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-15 00:08:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:05,909 INFO L225 Difference]: With dead ends: 5149 [2019-10-15 00:08:05,918 INFO L226 Difference]: Without dead ends: 3822 [2019-10-15 00:08:05,924 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 00:08:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2019-10-15 00:08:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3819. [2019-10-15 00:08:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3819 states. [2019-10-15 00:08:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 4957 transitions. [2019-10-15 00:08:06,068 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 4957 transitions. Word has length 138 [2019-10-15 00:08:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:06,069 INFO L462 AbstractCegarLoop]: Abstraction has 3819 states and 4957 transitions. [2019-10-15 00:08:06,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 4957 transitions. [2019-10-15 00:08:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:08:06,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:06,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:06,072 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 90955185, now seen corresponding path program 1 times [2019-10-15 00:08:06,073 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:06,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014330031] [2019-10-15 00:08:06,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:06,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:06,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:06,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014330031] [2019-10-15 00:08:06,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:06,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:06,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066282179] [2019-10-15 00:08:06,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:06,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:06,336 INFO L87 Difference]: Start difference. First operand 3819 states and 4957 transitions. Second operand 6 states. [2019-10-15 00:08:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:09,524 INFO L93 Difference]: Finished difference Result 7712 states and 10087 transitions. [2019-10-15 00:08:09,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:09,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-15 00:08:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:09,545 INFO L225 Difference]: With dead ends: 7712 [2019-10-15 00:08:09,545 INFO L226 Difference]: Without dead ends: 3899 [2019-10-15 00:08:09,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2019-10-15 00:08:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3889. [2019-10-15 00:08:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3889 states. [2019-10-15 00:08:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 4912 transitions. [2019-10-15 00:08:09,652 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 4912 transitions. Word has length 144 [2019-10-15 00:08:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:09,652 INFO L462 AbstractCegarLoop]: Abstraction has 3889 states and 4912 transitions. [2019-10-15 00:08:09,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 4912 transitions. [2019-10-15 00:08:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 00:08:09,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:09,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:09,655 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2025648949, now seen corresponding path program 1 times [2019-10-15 00:08:09,656 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:09,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861869097] [2019-10-15 00:08:09,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:09,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:09,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:09,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861869097] [2019-10-15 00:08:09,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783501986] [2019-10-15 00:08:09,956 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 00:08:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:10,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:08:10,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:10,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,590 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:08:10,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 13 [2019-10-15 00:08:10,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214825335] [2019-10-15 00:08:10,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:08:10,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:08:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:08:10,593 INFO L87 Difference]: Start difference. First operand 3889 states and 4912 transitions. Second operand 7 states. [2019-10-15 00:08:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:16,496 INFO L93 Difference]: Finished difference Result 10066 states and 12742 transitions. [2019-10-15 00:08:16,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 00:08:16,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2019-10-15 00:08:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:16,532 INFO L225 Difference]: With dead ends: 10066 [2019-10-15 00:08:16,533 INFO L226 Difference]: Without dead ends: 6183 [2019-10-15 00:08:16,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-15 00:08:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2019-10-15 00:08:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 5232. [2019-10-15 00:08:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5232 states. [2019-10-15 00:08:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 6648 transitions. [2019-10-15 00:08:16,777 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 6648 transitions. Word has length 169 [2019-10-15 00:08:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:16,777 INFO L462 AbstractCegarLoop]: Abstraction has 5232 states and 6648 transitions. [2019-10-15 00:08:16,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:08:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 6648 transitions. [2019-10-15 00:08:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 00:08:16,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:16,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:16,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:16,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -507621590, now seen corresponding path program 1 times [2019-10-15 00:08:16,991 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:16,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879557172] [2019-10-15 00:08:16,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:17,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879557172] [2019-10-15 00:08:17,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:17,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:08:17,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766954552] [2019-10-15 00:08:17,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:17,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:08:17,245 INFO L87 Difference]: Start difference. First operand 5232 states and 6648 transitions. Second operand 5 states.