/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:31:07,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:31:07,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:31:07,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:31:07,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:31:07,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:31:07,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:31:07,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:31:07,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:31:07,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:31:07,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:31:07,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:31:07,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:31:07,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:31:07,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:31:07,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:31:07,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:31:07,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:31:07,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:31:07,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:31:07,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:31:07,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:31:07,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:31:07,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:31:07,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:31:07,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:31:07,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:31:07,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:31:07,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:31:07,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:31:07,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:31:07,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:31:07,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:31:07,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:31:07,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:31:07,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:31:07,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:31:07,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:31:07,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:31:07,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:31:07,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:31:07,839 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 [2019-11-06 22:31:07,852 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:31:07,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:31:07,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:31:07,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:31:07,854 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:31:07,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:31:07,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:31:07,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:31:07,856 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:31:07,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:31:07,856 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:31:07,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:31:07,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:31:07,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:31:07,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:31:07,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:31:07,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:07,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:31:07,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:31:07,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:31:07,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:31:07,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:31:07,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:31:07,859 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 [2019-11-06 22:31:08,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:31:08,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:31:08,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:31:08,189 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:31:08,192 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:31:08,192 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label45.c [2019-11-06 22:31:08,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5cc92a4/f612e8514f7f4b3c9f156550c430503a/FLAGb258a0e0b [2019-11-06 22:31:08,726 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:31:08,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label45.c [2019-11-06 22:31:08,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5cc92a4/f612e8514f7f4b3c9f156550c430503a/FLAGb258a0e0b [2019-11-06 22:31:08,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5cc92a4/f612e8514f7f4b3c9f156550c430503a [2019-11-06 22:31:09,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:31:09,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:31:09,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:09,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:31:09,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:31:09,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:08" (1/1) ... [2019-11-06 22:31:09,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f907bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09, skipping insertion in model container [2019-11-06 22:31:09,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:08" (1/1) ... [2019-11-06 22:31:09,024 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:31:09,083 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:31:09,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:09,434 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:31:09,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:09,686 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:31:09,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09 WrapperNode [2019-11-06 22:31:09,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:09,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:31:09,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:31:09,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:31:09,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2019-11-06 22:31:09,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:31:09,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:31:09,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:31:09,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:31:09,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (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 [2019-11-06 22:31:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:31:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:31:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:31:09,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:31:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:31:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:31:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:31:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:31:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:31:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:31:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:31:11,111 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:31:11,111 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:31:11,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:11 BoogieIcfgContainer [2019-11-06 22:31:11,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:31:11,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:31:11,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:31:11,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:31:11,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:08" (1/3) ... [2019-11-06 22:31:11,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac9bbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:11, skipping insertion in model container [2019-11-06 22:31:11,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (2/3) ... [2019-11-06 22:31:11,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac9bbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:11, skipping insertion in model container [2019-11-06 22:31:11,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:11" (3/3) ... [2019-11-06 22:31:11,136 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label45.c [2019-11-06 22:31:11,148 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:31:11,164 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:31:11,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:31:11,219 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:31:11,219 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:31:11,220 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:31:11,221 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:31:11,221 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:31:11,221 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:31:11,221 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:31:11,222 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:31:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:31:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:31:11,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:11,287 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:11,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:11,295 INFO L82 PathProgramCache]: Analyzing trace with hash 700982975, now seen corresponding path program 1 times [2019-11-06 22:31:11,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:11,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248762958] [2019-11-06 22:31:11,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:11,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248762958] [2019-11-06 22:31:11,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:11,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:11,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853536263] [2019-11-06 22:31:11,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:11,833 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:11,850 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:31:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:12,719 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:31:12,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:12,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-11-06 22:31:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:12,754 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:31:12,755 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:31:12,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:31:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:31:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:31:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:31:12,838 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 123 [2019-11-06 22:31:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:12,839 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:31:12,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:31:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:31:12,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:12,844 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:12,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 538208968, now seen corresponding path program 1 times [2019-11-06 22:31:12,845 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:12,846 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948151925] [2019-11-06 22:31:12,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948151925] [2019-11-06 22:31:12,968 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:12,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:31:12,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505167942] [2019-11-06 22:31:12,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:31:12,971 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:31:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:31:12,972 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:31:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:13,699 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:31:13,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:31:13,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-11-06 22:31:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:13,706 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:31:13,706 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:31:13,708 INFO L630 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 [2019-11-06 22:31:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:31:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:31:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:31:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:31:13,778 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 133 [2019-11-06 22:31:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:13,778 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:31:13,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:31:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:31:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:31:13,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:13,783 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:13,783 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 129203270, now seen corresponding path program 1 times [2019-11-06 22:31:13,784 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:13,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90859166] [2019-11-06 22:31:13,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:14,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90859166] [2019-11-06 22:31:14,135 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:14,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:31:14,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699349180] [2019-11-06 22:31:14,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:31:14,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:31:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:14,137 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-11-06 22:31:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:14,813 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-11-06 22:31:14,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:31:14,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-11-06 22:31:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:14,818 INFO L225 Difference]: With dead ends: 1205 [2019-11-06 22:31:14,818 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:31:14,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:31:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:31:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:31:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-11-06 22:31:14,842 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 134 [2019-11-06 22:31:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:14,842 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-11-06 22:31:14,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:31:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-11-06 22:31:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:31:14,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:14,845 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:14,846 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:14,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1311022732, now seen corresponding path program 1 times [2019-11-06 22:31:14,846 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:14,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141148212] [2019-11-06 22:31:14,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:15,126 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141148212] [2019-11-06 22:31:15,126 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:15,126 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:31:15,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793259743] [2019-11-06 22:31:15,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:31:15,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:31:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:15,128 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 5 states. [2019-11-06 22:31:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:15,647 INFO L93 Difference]: Finished difference Result 1184 states and 1552 transitions. [2019-11-06 22:31:15,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:31:15,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-11-06 22:31:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:15,652 INFO L225 Difference]: With dead ends: 1184 [2019-11-06 22:31:15,652 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:31:15,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:31:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:31:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:31:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 708 transitions. [2019-11-06 22:31:15,673 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 708 transitions. Word has length 135 [2019-11-06 22:31:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:15,674 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 708 transitions. [2019-11-06 22:31:15,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:31:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 708 transitions. [2019-11-06 22:31:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:31:15,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:15,677 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:15,677 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -663161394, now seen corresponding path program 1 times [2019-11-06 22:31:15,678 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:15,678 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212003614] [2019-11-06 22:31:15,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:15,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212003614] [2019-11-06 22:31:15,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:15,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:15,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134436243] [2019-11-06 22:31:15,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:15,814 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:15,814 INFO L87 Difference]: Start difference. First operand 554 states and 708 transitions. Second operand 3 states. [2019-11-06 22:31:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:16,282 INFO L93 Difference]: Finished difference Result 1509 states and 1954 transitions. [2019-11-06 22:31:16,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:16,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 22:31:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:16,289 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:31:16,289 INFO L226 Difference]: Without dead ends: 961 [2019-11-06 22:31:16,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-11-06 22:31:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2019-11-06 22:31:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-11-06 22:31:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1180 transitions. [2019-11-06 22:31:16,322 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1180 transitions. Word has length 138 [2019-11-06 22:31:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:16,322 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1180 transitions. [2019-11-06 22:31:16,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1180 transitions. [2019-11-06 22:31:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 22:31:16,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:16,327 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:16,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1614473983, now seen corresponding path program 1 times [2019-11-06 22:31:16,328 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:16,328 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015197051] [2019-11-06 22:31:16,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:16,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015197051] [2019-11-06 22:31:16,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106658658] [2019-11-06 22:31:16,453 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 [2019-11-06 22:31:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:16,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:31:16,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:31:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:31:16,767 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:31:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:31:16,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1177505864] [2019-11-06 22:31:16,893 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 170 [2019-11-06 22:31:16,972 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:31:16,973 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)