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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:24:08,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:24:08,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:24:08,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:24:08,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:24:08,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:24:08,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:24:08,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:24:08,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:24:08,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:24:08,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:24:08,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:24:08,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:24:08,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:24:08,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:24:08,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:24:08,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:24:08,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:24:08,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:24:08,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:24:08,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:24:08,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:24:08,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:24:08,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:24:08,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:24:08,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:24:08,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:24:08,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:24:08,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:24:08,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:24:08,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:24:08,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:24:08,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:24:08,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:24:08,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:24:08,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:24:08,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:24:08,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:24:08,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:24:08,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:24:08,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:24:08,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:24:08,262 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:24:08,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:24:08,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:24:08,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:24:08,264 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:24:08,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:24:08,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:24:08,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:24:08,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:24:08,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:24:08,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:24:08,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:24:08,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:24:08,267 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:24:08,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:24:08,268 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:24:08,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:24:08,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:24:08,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:24:08,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:24:08,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:24:08,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:24:08,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:24:08,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:24:08,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:24:08,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:24:08,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:24:08,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:24:08,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:24:08,594 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:24:08,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:24:08,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:24:08,611 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:24:08,611 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:24:08,612 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 21:24:08,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5a6447b6/fc9c06b71cb140628ce23292720513ed/FLAG1c6dd062d [2019-10-13 21:24:09,162 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:24:09,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 21:24:09,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5a6447b6/fc9c06b71cb140628ce23292720513ed/FLAG1c6dd062d [2019-10-13 21:24:09,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5a6447b6/fc9c06b71cb140628ce23292720513ed [2019-10-13 21:24:09,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:24:09,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:24:09,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:24:09,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:24:09,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:24:09,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:09,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5f647f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09, skipping insertion in model container [2019-10-13 21:24:09,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:09,538 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:24:09,577 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:24:09,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:24:09,807 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:24:09,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:24:09,998 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:24:09,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09 WrapperNode [2019-10-13 21:24:09,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:24:10,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:24:10,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:24:10,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:24:10,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (1/1) ... [2019-10-13 21:24:10,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:24:10,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:24:10,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:24:10,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:24:10,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (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 [2019-10-13 21:24:10,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:24:10,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:24:10,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:24:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:24:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 21:24:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 21:24:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:24:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:24:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:24:10,676 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:24:10,677 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 21:24:10,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:24:10 BoogieIcfgContainer [2019-10-13 21:24:10,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:24:10,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:24:10,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:24:10,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:24:10,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:24:09" (1/3) ... [2019-10-13 21:24:10,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d0ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:24:10, skipping insertion in model container [2019-10-13 21:24:10,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:24:09" (2/3) ... [2019-10-13 21:24:10,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d0ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:24:10, skipping insertion in model container [2019-10-13 21:24:10,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:24:10" (3/3) ... [2019-10-13 21:24:10,696 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 21:24:10,707 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:24:10,734 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:24:10,749 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:24:10,783 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:24:10,783 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:24:10,784 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:24:10,784 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:24:10,786 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:24:10,786 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:24:10,787 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:24:10,787 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:24:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2019-10-13 21:24:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 21:24:10,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:10,816 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:24:10,817 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1555775493, now seen corresponding path program 1 times [2019-10-13 21:24:10,829 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:10,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555018716] [2019-10-13 21:24:10,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:10,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:10,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:11,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555018716] [2019-10-13 21:24:11,175 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:11,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:24:11,178 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59223553] [2019-10-13 21:24:11,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:24:11,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:24:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:11,204 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2019-10-13 21:24:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:11,285 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2019-10-13 21:24:11,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:24:11,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-13 21:24:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:11,309 INFO L225 Difference]: With dead ends: 197 [2019-10-13 21:24:11,309 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 21:24:11,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 21:24:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-10-13 21:24:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 21:24:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2019-10-13 21:24:11,373 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 41 [2019-10-13 21:24:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:11,374 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-10-13 21:24:11,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:24:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2019-10-13 21:24:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 21:24:11,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:11,376 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] [2019-10-13 21:24:11,377 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 477079428, now seen corresponding path program 1 times [2019-10-13 21:24:11,378 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:11,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833852779] [2019-10-13 21:24:11,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:11,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:11,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:11,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833852779] [2019-10-13 21:24:11,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:11,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:24:11,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109909345] [2019-10-13 21:24:11,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:24:11,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:24:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:11,522 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand 3 states. [2019-10-13 21:24:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:11,581 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2019-10-13 21:24:11,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:24:11,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-10-13 21:24:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:11,586 INFO L225 Difference]: With dead ends: 292 [2019-10-13 21:24:11,586 INFO L226 Difference]: Without dead ends: 192 [2019-10-13 21:24:11,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-13 21:24:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-10-13 21:24:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-13 21:24:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 285 transitions. [2019-10-13 21:24:11,648 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 285 transitions. Word has length 42 [2019-10-13 21:24:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:11,648 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 285 transitions. [2019-10-13 21:24:11,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:24:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 285 transitions. [2019-10-13 21:24:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 21:24:11,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:11,651 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] [2019-10-13 21:24:11,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1738555772, now seen corresponding path program 1 times [2019-10-13 21:24:11,652 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:11,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046136670] [2019-10-13 21:24:11,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:11,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:11,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:11,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046136670] [2019-10-13 21:24:11,772 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:11,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:24:11,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698141142] [2019-10-13 21:24:11,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:24:11,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:11,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:24:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:24:11,774 INFO L87 Difference]: Start difference. First operand 190 states and 285 transitions. Second operand 5 states. [2019-10-13 21:24:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:11,990 INFO L93 Difference]: Finished difference Result 854 states and 1329 transitions. [2019-10-13 21:24:11,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:24:11,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-10-13 21:24:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:12,000 INFO L225 Difference]: With dead ends: 854 [2019-10-13 21:24:12,000 INFO L226 Difference]: Without dead ends: 688 [2019-10-13 21:24:12,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:24:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-13 21:24:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 354. [2019-10-13 21:24:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-10-13 21:24:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 537 transitions. [2019-10-13 21:24:12,096 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 537 transitions. Word has length 43 [2019-10-13 21:24:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:12,096 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 537 transitions. [2019-10-13 21:24:12,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:24:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 537 transitions. [2019-10-13 21:24:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 21:24:12,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:12,101 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] [2019-10-13 21:24:12,105 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1920813121, now seen corresponding path program 1 times [2019-10-13 21:24:12,106 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:12,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025668090] [2019-10-13 21:24:12,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:12,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025668090] [2019-10-13 21:24:12,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:12,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:24:12,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947028715] [2019-10-13 21:24:12,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:24:12,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:24:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:24:12,294 INFO L87 Difference]: Start difference. First operand 354 states and 537 transitions. Second operand 5 states. [2019-10-13 21:24:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:12,443 INFO L93 Difference]: Finished difference Result 1232 states and 1892 transitions. [2019-10-13 21:24:12,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:24:12,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-13 21:24:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:12,454 INFO L225 Difference]: With dead ends: 1232 [2019-10-13 21:24:12,454 INFO L226 Difference]: Without dead ends: 902 [2019-10-13 21:24:12,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:24:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-10-13 21:24:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 898. [2019-10-13 21:24:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2019-10-13 21:24:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1369 transitions. [2019-10-13 21:24:12,535 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1369 transitions. Word has length 44 [2019-10-13 21:24:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:12,536 INFO L462 AbstractCegarLoop]: Abstraction has 898 states and 1369 transitions. [2019-10-13 21:24:12,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:24:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1369 transitions. [2019-10-13 21:24:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 21:24:12,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:12,545 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] [2019-10-13 21:24:12,545 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1112409250, now seen corresponding path program 1 times [2019-10-13 21:24:12,547 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:12,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68812372] [2019-10-13 21:24:12,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:12,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68812372] [2019-10-13 21:24:12,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:12,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:24:12,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022895896] [2019-10-13 21:24:12,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:24:12,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:24:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:12,636 INFO L87 Difference]: Start difference. First operand 898 states and 1369 transitions. Second operand 3 states. [2019-10-13 21:24:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:12,772 INFO L93 Difference]: Finished difference Result 2334 states and 3555 transitions. [2019-10-13 21:24:12,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:24:12,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-13 21:24:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:12,781 INFO L225 Difference]: With dead ends: 2334 [2019-10-13 21:24:12,781 INFO L226 Difference]: Without dead ends: 1460 [2019-10-13 21:24:12,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-10-13 21:24:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1458. [2019-10-13 21:24:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2019-10-13 21:24:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2185 transitions. [2019-10-13 21:24:12,879 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2185 transitions. Word has length 46 [2019-10-13 21:24:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:12,880 INFO L462 AbstractCegarLoop]: Abstraction has 1458 states and 2185 transitions. [2019-10-13 21:24:12,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:24:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2185 transitions. [2019-10-13 21:24:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 21:24:12,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:12,881 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] [2019-10-13 21:24:12,881 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1926406488, now seen corresponding path program 1 times [2019-10-13 21:24:12,882 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:12,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658201704] [2019-10-13 21:24:12,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:12,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:12,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658201704] [2019-10-13 21:24:12,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:12,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:24:12,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443124063] [2019-10-13 21:24:12,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:24:12,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:24:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:24:12,995 INFO L87 Difference]: Start difference. First operand 1458 states and 2185 transitions. Second operand 6 states. [2019-10-13 21:24:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:13,490 INFO L93 Difference]: Finished difference Result 5648 states and 8476 transitions. [2019-10-13 21:24:13,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:24:13,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-13 21:24:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:13,517 INFO L225 Difference]: With dead ends: 5648 [2019-10-13 21:24:13,517 INFO L226 Difference]: Without dead ends: 4214 [2019-10-13 21:24:13,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:24:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2019-10-13 21:24:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 4210. [2019-10-13 21:24:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4210 states. [2019-10-13 21:24:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6281 transitions. [2019-10-13 21:24:13,843 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6281 transitions. Word has length 46 [2019-10-13 21:24:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:13,845 INFO L462 AbstractCegarLoop]: Abstraction has 4210 states and 6281 transitions. [2019-10-13 21:24:13,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:24:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6281 transitions. [2019-10-13 21:24:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 21:24:13,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:13,847 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] [2019-10-13 21:24:13,848 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash -742396141, now seen corresponding path program 1 times [2019-10-13 21:24:13,848 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:13,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255323668] [2019-10-13 21:24:13,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:13,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:13,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:13,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255323668] [2019-10-13 21:24:13,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:13,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:24:13,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58304622] [2019-10-13 21:24:13,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:24:13,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:13,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:24:13,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:24:13,942 INFO L87 Difference]: Start difference. First operand 4210 states and 6281 transitions. Second operand 5 states. [2019-10-13 21:24:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:14,612 INFO L93 Difference]: Finished difference Result 8684 states and 12826 transitions. [2019-10-13 21:24:14,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:24:14,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-10-13 21:24:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:14,659 INFO L225 Difference]: With dead ends: 8684 [2019-10-13 21:24:14,659 INFO L226 Difference]: Without dead ends: 8682 [2019-10-13 21:24:14,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:24:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2019-10-13 21:24:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 4498. [2019-10-13 21:24:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-10-13 21:24:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6569 transitions. [2019-10-13 21:24:15,109 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6569 transitions. Word has length 46 [2019-10-13 21:24:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:15,110 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6569 transitions. [2019-10-13 21:24:15,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:24:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6569 transitions. [2019-10-13 21:24:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 21:24:15,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:15,111 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] [2019-10-13 21:24:15,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1529824191, now seen corresponding path program 1 times [2019-10-13 21:24:15,112 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:15,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202866052] [2019-10-13 21:24:15,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:15,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:15,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:15,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202866052] [2019-10-13 21:24:15,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:24:15,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:24:15,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469842631] [2019-10-13 21:24:15,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:24:15,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:24:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:15,189 INFO L87 Difference]: Start difference. First operand 4498 states and 6569 transitions. Second operand 3 states. [2019-10-13 21:24:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:15,663 INFO L93 Difference]: Finished difference Result 10814 states and 15783 transitions. [2019-10-13 21:24:15,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:24:15,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-10-13 21:24:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:15,696 INFO L225 Difference]: With dead ends: 10814 [2019-10-13 21:24:15,696 INFO L226 Difference]: Without dead ends: 6340 [2019-10-13 21:24:15,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:24:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2019-10-13 21:24:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6278. [2019-10-13 21:24:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2019-10-13 21:24:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9057 transitions. [2019-10-13 21:24:16,182 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9057 transitions. Word has length 47 [2019-10-13 21:24:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:24:16,182 INFO L462 AbstractCegarLoop]: Abstraction has 6278 states and 9057 transitions. [2019-10-13 21:24:16,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:24:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9057 transitions. [2019-10-13 21:24:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 21:24:16,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:24:16,186 INFO L380 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] [2019-10-13 21:24:16,186 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:24:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1418257868, now seen corresponding path program 1 times [2019-10-13 21:24:16,187 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:24:16,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-13 21:24:16,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:16,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:24:16,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:24:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:16,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-13 21:24:16,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233505318] [2019-10-13 21:24:16,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:24:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:24:16,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:24:16,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:24:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:16,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:24:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:24:16,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [755078565] [2019-10-13 21:24:16,672 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 66 [2019-10-13 21:24:16,717 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:24:16,717 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:24:16,814 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 21:24:16,956 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 21:24:16,962 INFO L272 AbstractInterpreter]: Visited 52 different actions 90 times. Merged at 25 different actions 32 times. Never widened. Performed 377 root evaluator evaluations with a maximum evaluation depth of 5. Performed 377 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 3 fixpoints after 2 different actions. Largest state had 94 variables. [2019-10-13 21:24:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:24:16,967 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 21:24:17,144 INFO L227 lantSequenceWeakener]: Weakened 39 states. On average, predicates are now at 83.19% of their original sizes. [2019-10-13 21:24:17,144 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 21:24:18,628 INFO L553 sIntCurrentIteration]: We unified 64 AI predicates to 64 [2019-10-13 21:24:18,629 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 21:24:18,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:24:18,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [7, 7, 7] total 45 [2019-10-13 21:24:18,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304267203] [2019-10-13 21:24:18,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 21:24:18,631 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 21:24:18,632 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 21:24:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 21:24:18,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 21:24:18,633 INFO L87 Difference]: Start difference. First operand 6278 states and 9057 transitions. Second operand 36 states. [2019-10-13 21:24:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:24:40,696 INFO L93 Difference]: Finished difference Result 26238 states and 37525 transitions. [2019-10-13 21:24:40,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2019-10-13 21:24:40,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2019-10-13 21:24:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:24:40,774 INFO L225 Difference]: With dead ends: 26238 [2019-10-13 21:24:40,774 INFO L226 Difference]: Without dead ends: 19986 [2019-10-13 21:24:40,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21986 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6908, Invalid=43942, Unknown=0, NotChecked=0, Total=50850 [2019-10-13 21:24:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19986 states.