/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:29:26,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:29:26,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:29:26,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:29:26,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:29:26,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:29:26,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:29:26,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:29:26,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:29:26,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:29:26,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:29:26,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:29:26,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:29:26,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:29:26,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:29:26,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:29:26,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:29:26,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:29:26,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:29:26,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:29:26,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:29:26,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:29:26,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:29:26,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:29:26,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:29:26,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:29:26,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:29:26,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:29:26,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:29:26,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:29:26,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:29:26,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:29:26,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:29:26,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:29:26,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:29:26,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:29:26,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:29:26,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:29:26,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:29:26,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:29:26,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:29:26,336 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:29:26,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:29:26,337 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:29:26,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:29:26,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:29:26,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:29:26,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:29:26,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:29:26,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:29:26,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:29:26,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:29:26,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:29:26,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:29:26,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:29:26,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:29:26,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:29:26,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:29:26,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:29:26,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:29:26,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:29:26,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:29:26,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:29:26,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:29:26,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:29:26,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:29:26,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:29:26,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:29:26,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:29:26,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:29:26,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:29:26,696 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:29:26,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-08-21 21:29:26,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8916c7ed8/76a537d827b242778f633287c28e217b/FLAGcd7a59ec2 [2020-08-21 21:29:27,214 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:29:27,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-08-21 21:29:27,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8916c7ed8/76a537d827b242778f633287c28e217b/FLAGcd7a59ec2 [2020-08-21 21:29:27,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8916c7ed8/76a537d827b242778f633287c28e217b [2020-08-21 21:29:27,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:29:27,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:29:27,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:27,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:29:27,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:29:27,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:27" (1/1) ... [2020-08-21 21:29:27,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e5f6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:27, skipping insertion in model container [2020-08-21 21:29:27,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:27" (1/1) ... [2020-08-21 21:29:27,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:29:27,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:29:27,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:27,847 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:29:28,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:28,078 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:29:28,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28 WrapperNode [2020-08-21 21:29:28,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:28,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:29:28,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:29:28,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:29:28,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... [2020-08-21 21:29:28,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:29:28,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:29:28,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:29:28,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:29:28,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 21:29:28,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:29:28,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:29:28,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:29:28,209 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-08-21 21:29:28,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:29:28,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-08-21 21:29:28,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:29:28,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:29:28,210 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-08-21 21:29:28,210 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-08-21 21:29:28,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:29:28,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 21:29:28,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 21:29:28,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:29:28,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:29:28,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:29:28,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:29:28,643 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:29:28,644 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-21 21:29:28,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:28 BoogieIcfgContainer [2020-08-21 21:29:28,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:29:28,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:29:28,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:29:28,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:29:28,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:29:27" (1/3) ... [2020-08-21 21:29:28,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f08fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:28, skipping insertion in model container [2020-08-21 21:29:28,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:28" (2/3) ... [2020-08-21 21:29:28,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f08fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:28, skipping insertion in model container [2020-08-21 21:29:28,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:28" (3/3) ... [2020-08-21 21:29:28,657 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-08-21 21:29:28,668 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:29:28,676 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:29:28,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:29:28,720 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:29:28,720 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:29:28,721 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:29:28,721 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:29:28,721 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:29:28,722 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:29:28,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:29:28,722 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:29:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-21 21:29:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 21:29:28,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:28,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:28,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-08-21 21:29:28,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:28,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238414120] [2020-08-21 21:29:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:29,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238414120] [2020-08-21 21:29:29,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:29,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:29:29,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163635638] [2020-08-21 21:29:29,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:29:29,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:29:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:29,065 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-21 21:29:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:29,296 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-08-21 21:29:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:29:29,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 21:29:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:29,308 INFO L225 Difference]: With dead ends: 127 [2020-08-21 21:29:29,309 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 21:29:29,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 21:29:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-08-21 21:29:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 21:29:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-08-21 21:29:29,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-08-21 21:29:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:29,362 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-08-21 21:29:29,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:29:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-08-21 21:29:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 21:29:29,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:29,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:29,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:29:29,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-08-21 21:29:29,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:29,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269429329] [2020-08-21 21:29:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:29,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269429329] [2020-08-21 21:29:29,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:29,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:29:29,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823278203] [2020-08-21 21:29:29,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:29,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:29,532 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-08-21 21:29:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:29,684 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-21 21:29:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:29,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-21 21:29:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:29,686 INFO L225 Difference]: With dead ends: 40 [2020-08-21 21:29:29,686 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 21:29:29,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 21:29:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-08-21 21:29:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 21:29:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-21 21:29:29,695 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-08-21 21:29:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:29,695 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-21 21:29:29,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-21 21:29:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 21:29:29,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:29,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:29,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:29:29,697 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-08-21 21:29:29,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:29,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975033475] [2020-08-21 21:29:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:29,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975033475] [2020-08-21 21:29:29,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:29,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:29:29,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740276219] [2020-08-21 21:29:29,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:29,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:29,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:29,795 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-21 21:29:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:29,984 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 21:29:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:29,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 21:29:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:29,986 INFO L225 Difference]: With dead ends: 48 [2020-08-21 21:29:29,986 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 21:29:29,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 21:29:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-08-21 21:29:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 21:29:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 21:29:29,995 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-08-21 21:29:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:29,995 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 21:29:29,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 21:29:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 21:29:29,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:29,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:29,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:29:29,997 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-08-21 21:29:29,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:29,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912003007] [2020-08-21 21:29:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:29:30,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912003007] [2020-08-21 21:29:30,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:30,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:29:30,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169089699] [2020-08-21 21:29:30,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:30,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:30,104 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-21 21:29:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:30,323 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-21 21:29:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:29:30,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-21 21:29:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:30,325 INFO L225 Difference]: With dead ends: 37 [2020-08-21 21:29:30,325 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 21:29:30,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 21:29:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-08-21 21:29:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 21:29:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 21:29:30,336 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-08-21 21:29:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:30,337 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 21:29:30,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 21:29:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 21:29:30,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:30,339 INFO L422 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] [2020-08-21 21:29:30,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:29:30,339 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-08-21 21:29:30,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:30,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353249743] [2020-08-21 21:29:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:29:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353249743] [2020-08-21 21:29:30,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:30,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:29:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036658837] [2020-08-21 21:29:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:30,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:30,508 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-08-21 21:29:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:30,684 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-21 21:29:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:29:30,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-21 21:29:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:30,688 INFO L225 Difference]: With dead ends: 66 [2020-08-21 21:29:30,689 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 21:29:30,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 21:29:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 21:29:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 21:29:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 21:29:30,710 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-08-21 21:29:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:30,711 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 21:29:30,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 21:29:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 21:29:30,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:30,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:30,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:29:30,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-08-21 21:29:30,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:30,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994667332] [2020-08-21 21:29:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:29:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 21:29:30,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994667332] [2020-08-21 21:29:30,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:30,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:30,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584941426] [2020-08-21 21:29:30,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:30,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:30,894 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-08-21 21:29:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:31,107 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-08-21 21:29:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:31,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-08-21 21:29:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:31,117 INFO L225 Difference]: With dead ends: 78 [2020-08-21 21:29:31,118 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 21:29:31,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 21:29:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 21:29:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 21:29:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-21 21:29:31,139 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-08-21 21:29:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:31,140 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-21 21:29:31,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-21 21:29:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:29:31,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:31,142 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:31,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:29:31,142 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-08-21 21:29:31,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:31,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905206093] [2020-08-21 21:29:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 21:29:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 21:29:31,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905206093] [2020-08-21 21:29:31,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:31,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:29:31,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927658616] [2020-08-21 21:29:31,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:29:31,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:29:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:29:31,302 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-08-21 21:29:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:31,498 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-08-21 21:29:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:29:31,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 21:29:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:31,500 INFO L225 Difference]: With dead ends: 90 [2020-08-21 21:29:31,500 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 21:29:31,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:29:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 21:29:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-08-21 21:29:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 21:29:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-08-21 21:29:31,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-08-21 21:29:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:31,510 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-08-21 21:29:31,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:29:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-08-21 21:29:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:29:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:31,512 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:31,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:29:31,512 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-08-21 21:29:31,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:31,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879971507] [2020-08-21 21:29:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 21:29:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-21 21:29:31,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879971507] [2020-08-21 21:29:31,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:31,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:31,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076249434] [2020-08-21 21:29:31,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:31,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:31,661 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2020-08-21 21:29:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:31,907 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-08-21 21:29:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:29:31,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-08-21 21:29:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:31,910 INFO L225 Difference]: With dead ends: 102 [2020-08-21 21:29:31,910 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 21:29:31,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:29:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 21:29:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-21 21:29:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 21:29:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-08-21 21:29:31,920 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-08-21 21:29:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:31,920 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-08-21 21:29:31,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-08-21 21:29:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:29:31,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:31,922 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:31,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:29:31,922 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-08-21 21:29:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:31,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120327757] [2020-08-21 21:29:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:29:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-21 21:29:32,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120327757] [2020-08-21 21:29:32,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:32,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:29:32,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505728166] [2020-08-21 21:29:32,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:29:32,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:29:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:32,063 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-08-21 21:29:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:32,348 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-08-21 21:29:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:29:32,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-08-21 21:29:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:32,350 INFO L225 Difference]: With dead ends: 108 [2020-08-21 21:29:32,350 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 21:29:32,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:29:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 21:29:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 21:29:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 21:29:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 21:29:32,362 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-08-21 21:29:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:32,364 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 21:29:32,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:29:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 21:29:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 21:29:32,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:32,366 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:32,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:29:32,366 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:32,367 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-08-21 21:29:32,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:32,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051345591] [2020-08-21 21:29:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-08-21 21:29:32,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051345591] [2020-08-21 21:29:32,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:32,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:32,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334776995] [2020-08-21 21:29:32,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:32,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:32,532 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2020-08-21 21:29:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:32,789 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-08-21 21:29:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:29:32,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 21:29:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:32,792 INFO L225 Difference]: With dead ends: 168 [2020-08-21 21:29:32,792 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 21:29:32,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 21:29:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-08-21 21:29:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 21:29:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-08-21 21:29:32,812 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-08-21 21:29:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:32,813 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-08-21 21:29:32,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-08-21 21:29:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 21:29:32,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:32,817 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:32,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:29:32,818 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:32,818 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-08-21 21:29:32,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:32,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822514579] [2020-08-21 21:29:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-08-21 21:29:32,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822514579] [2020-08-21 21:29:32,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:32,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:32,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093693840] [2020-08-21 21:29:32,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:32,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:32,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:32,996 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 7 states. [2020-08-21 21:29:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:33,235 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-08-21 21:29:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:33,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 21:29:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:33,239 INFO L225 Difference]: With dead ends: 109 [2020-08-21 21:29:33,239 INFO L226 Difference]: Without dead ends: 107 [2020-08-21 21:29:33,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-21 21:29:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-08-21 21:29:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 21:29:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-08-21 21:29:33,269 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-08-21 21:29:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:33,270 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-08-21 21:29:33,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-08-21 21:29:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-21 21:29:33,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:33,279 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:33,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:29:33,280 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-08-21 21:29:33,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:33,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81990090] [2020-08-21 21:29:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-08-21 21:29:33,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81990090] [2020-08-21 21:29:33,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:33,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:29:33,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452223978] [2020-08-21 21:29:33,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:29:33,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:29:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:29:33,531 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 8 states. [2020-08-21 21:29:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:33,759 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-08-21 21:29:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:29:33,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-08-21 21:29:33,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:33,762 INFO L225 Difference]: With dead ends: 142 [2020-08-21 21:29:33,764 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 21:29:33,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:29:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 21:29:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-08-21 21:29:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 21:29:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-08-21 21:29:33,785 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 102 [2020-08-21 21:29:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:33,786 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-08-21 21:29:33,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:29:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-08-21 21:29:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 21:29:33,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:33,789 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:33,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:29:33,789 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:33,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:33,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1572842069, now seen corresponding path program 9 times [2020-08-21 21:29:33,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:33,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753288689] [2020-08-21 21:29:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:33,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 21:29:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 619 proven. 297 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-08-21 21:29:34,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753288689] [2020-08-21 21:29:34,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:34,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:34,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997905677] [2020-08-21 21:29:34,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:34,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:34,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:34,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:34,017 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 9 states. [2020-08-21 21:29:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:34,372 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2020-08-21 21:29:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:29:34,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-21 21:29:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:34,375 INFO L225 Difference]: With dead ends: 239 [2020-08-21 21:29:34,375 INFO L226 Difference]: Without dead ends: 176 [2020-08-21 21:29:34,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:29:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-08-21 21:29:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-08-21 21:29:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 21:29:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-08-21 21:29:34,387 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-08-21 21:29:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:34,387 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-08-21 21:29:34,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-08-21 21:29:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 21:29:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:34,389 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:34,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:29:34,390 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 10 times [2020-08-21 21:29:34,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:34,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49208166] [2020-08-21 21:29:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 21:29:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-08-21 21:29:34,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49208166] [2020-08-21 21:29:34,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:34,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:34,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723025764] [2020-08-21 21:29:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:34,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:34,572 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 9 states. [2020-08-21 21:29:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:34,964 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2020-08-21 21:29:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:29:34,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-21 21:29:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:34,967 INFO L225 Difference]: With dead ends: 175 [2020-08-21 21:29:34,968 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 21:29:34,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:29:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 21:29:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-08-21 21:29:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-21 21:29:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-08-21 21:29:34,984 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 135 [2020-08-21 21:29:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:34,985 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-08-21 21:29:34,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-08-21 21:29:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-21 21:29:34,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:34,989 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:34,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:29:34,990 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 11 times [2020-08-21 21:29:34,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:34,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875412124] [2020-08-21 21:29:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 21:29:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 21:29:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-08-21 21:29:35,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875412124] [2020-08-21 21:29:35,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:35,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:29:35,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054455047] [2020-08-21 21:29:35,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:29:35,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:29:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:35,275 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 10 states. [2020-08-21 21:29:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:35,594 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2020-08-21 21:29:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:29:35,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2020-08-21 21:29:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:35,597 INFO L225 Difference]: With dead ends: 208 [2020-08-21 21:29:35,597 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 21:29:35,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:29:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 21:29:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-08-21 21:29:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-21 21:29:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-08-21 21:29:35,611 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 168 [2020-08-21 21:29:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:35,612 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-08-21 21:29:35,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:29:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-08-21 21:29:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-21 21:29:35,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:35,614 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 33, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:35,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:29:35,615 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash -886069047, now seen corresponding path program 12 times [2020-08-21 21:29:35,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:35,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037818393] [2020-08-21 21:29:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:29:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 21:29:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 21:29:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-21 21:29:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-21 21:29:35,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037818393] [2020-08-21 21:29:35,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:35,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:35,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613525326] [2020-08-21 21:29:35,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:35,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:35,864 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 7 states. [2020-08-21 21:29:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:36,100 INFO L93 Difference]: Finished difference Result 204 states and 240 transitions. [2020-08-21 21:29:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:29:36,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-08-21 21:29:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:36,102 INFO L225 Difference]: With dead ends: 204 [2020-08-21 21:29:36,102 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:29:36,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:29:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:29:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:29:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:29:36,105 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-08-21 21:29:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:29:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:29:36,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:29:36,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:29:36,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:29:36,489 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-08-21 21:29:36,489 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-08-21 21:29:36,490 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-08-21 21:29:36,490 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-08-21 21:29:36,490 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-08-21 21:29:36,490 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-08-21 21:29:36,491 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-08-21 21:29:36,491 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-08-21 21:29:36,491 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-08-21 21:29:36,491 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-08-21 21:29:36,492 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-08-21 21:29:36,492 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-08-21 21:29:36,492 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-08-21 21:29:36,492 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-08-21 21:29:36,493 INFO L264 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-08-21 21:29:36,493 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-08-21 21:29:36,493 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-08-21 21:29:36,493 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-08-21 21:29:36,494 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-08-21 21:29:36,494 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-21 21:29:36,494 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-08-21 21:29:36,494 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-08-21 21:29:36,495 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-08-21 21:29:36,495 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-08-21 21:29:36,495 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-08-21 21:29:36,496 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-08-21 21:29:36,496 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-08-21 21:29:36,496 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-08-21 21:29:36,496 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-08-21 21:29:36,497 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 21:29:36,497 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-08-21 21:29:36,497 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-08-21 21:29:36,498 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-08-21 21:29:36,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:36,500 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#x~0.offset| |old(~#x~0.offset)|) (= |old(#memory_real)| |#memory_real|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 21:29:36,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:36,500 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-08-21 21:29:36,501 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-08-21 21:29:36,502 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-08-21 21:29:36,502 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-08-21 21:29:36,503 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-08-21 21:29:36,503 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:36,503 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:29:36,503 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:29:36,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:36,504 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-21 21:29:36,504 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-08-21 21:29:36,505 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-08-21 21:29:36,505 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-08-21 21:29:36,505 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-21 21:29:36,506 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-08-21 21:29:36,506 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-08-21 21:29:36,506 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-08-21 21:29:36,506 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 21:29:36,507 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-08-21 21:29:36,507 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-08-21 21:29:36,507 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-21 21:29:36,507 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-08-21 21:29:36,508 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 21:29:36,508 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 21:29:36,508 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 21:29:36,508 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 21:29:36,509 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 21:29:36,509 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 21:29:36,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:29:36 BoogieIcfgContainer [2020-08-21 21:29:36,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:29:36,542 INFO L168 Benchmark]: Toolchain (without parser) took 8966.23 ms. Allocated memory was 143.1 MB in the beginning and 302.5 MB in the end (delta: 159.4 MB). Free memory was 105.0 MB in the beginning and 111.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 152.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:36,547 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:29:36,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.69 ms. Allocated memory was 143.1 MB in the beginning and 208.1 MB in the end (delta: 65.0 MB). Free memory was 104.8 MB in the beginning and 184.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:36,555 INFO L168 Benchmark]: Boogie Preprocessor took 68.72 ms. Allocated memory is still 208.1 MB. Free memory was 184.7 MB in the beginning and 182.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:36,556 INFO L168 Benchmark]: RCFGBuilder took 498.72 ms. Allocated memory is still 208.1 MB. Free memory was 182.3 MB in the beginning and 155.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:36,559 INFO L168 Benchmark]: TraceAbstraction took 7886.98 ms. Allocated memory was 208.1 MB in the beginning and 302.5 MB in the end (delta: 94.4 MB). Free memory was 154.6 MB in the beginning and 111.4 MB in the end (delta: 43.2 MB). Peak memory consumption was 137.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:36,567 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 506.69 ms. Allocated memory was 143.1 MB in the beginning and 208.1 MB in the end (delta: 65.0 MB). Free memory was 104.8 MB in the beginning and 184.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.72 ms. Allocated memory is still 208.1 MB. Free memory was 184.7 MB in the beginning and 182.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 498.72 ms. Allocated memory is still 208.1 MB. Free memory was 182.3 MB in the beginning and 155.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7886.98 ms. Allocated memory was 208.1 MB in the beginning and 302.5 MB in the end (delta: 94.4 MB). Free memory was 154.6 MB in the beginning and 111.4 MB in the end (delta: 43.2 MB). Peak memory consumption was 137.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (i <= 5 && n <= 5) && 5 <= n - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: n <= 5 && 5 <= n - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 16, TraceHistogramMax: 36, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 467 SDslu, 506 SDs, 0 SdLazy, 1311 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 142 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 65 PreInvPairs, 141 NumberOfFragments, 96 HoareAnnotationTreeSize, 65 FomulaSimplifications, 2732 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 21 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1160 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1144 ConstructedInterpolants, 0 QuantifiedInterpolants, 415440 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 4614/9037 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...