/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 false -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 13:26:09,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:26:09,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:26:09,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:26:09,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:26:09,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:26:09,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:26:09,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:26:09,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:26:09,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:26:09,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:26:09,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:26:09,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:26:09,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:26:09,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:26:09,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:26:09,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:26:09,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:26:09,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:26:09,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:26:09,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:26:09,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:26:09,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:26:09,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:26:09,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:26:09,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:26:09,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:26:09,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:26:09,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:26:09,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:26:09,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:26:09,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:26:09,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:26:09,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:26:09,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:26:09,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:26:09,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:26:09,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:26:09,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:26:09,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:26:09,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:26:09,917 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 13:26:09,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:26:09,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:26:09,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:26:09,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:26:09,941 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:26:09,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:26:09,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:26:09,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:26:09,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:26:09,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:26:09,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:26:09,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:26:09,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:26:09,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:26:09,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:26:09,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:26:09,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:26:09,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:26:09,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:26:09,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:26:09,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:26:09,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:26:09,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:26:09,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:26:09,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:26:09,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:26:09,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:26:09,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:26:09,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:26:09,946 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 -> false [2020-08-21 13:26:10,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:26:10,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:26:10,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:26:10,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:26:10,302 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:26:10,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-08-21 13:26:10,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d0fb4f0/367c4b9e0b8744fca2bd591b440f409f/FLAGce8f0f72d [2020-08-21 13:26:10,848 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:26:10,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-08-21 13:26:10,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d0fb4f0/367c4b9e0b8744fca2bd591b440f409f/FLAGce8f0f72d [2020-08-21 13:26:11,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d0fb4f0/367c4b9e0b8744fca2bd591b440f409f [2020-08-21 13:26:11,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:26:11,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:26:11,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:11,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:26:11,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:26:11,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11, skipping insertion in model container [2020-08-21 13:26:11,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:26:11,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:26:11,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:11,504 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:26:11,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:11,640 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:26:11,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11 WrapperNode [2020-08-21 13:26:11,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:11,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:26:11,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:26:11,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:26:11,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (1/1) ... [2020-08-21 13:26:11,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:26:11,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:26:11,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:26:11,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:26:11,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (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 13:26:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:26:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:26:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:26:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-08-21 13:26:11,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:26:11,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-08-21 13:26:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:26:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:26:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:26:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:26:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:26:12,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:26:12,251 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-21 13:26:12,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:12 BoogieIcfgContainer [2020-08-21 13:26:12,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:26:12,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:26:12,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:26:12,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:26:12,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:26:11" (1/3) ... [2020-08-21 13:26:12,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ed7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:12, skipping insertion in model container [2020-08-21 13:26:12,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:11" (2/3) ... [2020-08-21 13:26:12,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ed7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:12, skipping insertion in model container [2020-08-21 13:26:12,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:12" (3/3) ... [2020-08-21 13:26:12,268 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-08-21 13:26:12,281 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:26:12,291 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:26:12,305 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:26:12,340 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:26:12,340 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:26:12,340 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:26:12,341 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:26:12,341 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:26:12,341 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:26:12,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:26:12,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:26:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-21 13:26:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 13:26:12,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:12,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:12,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-08-21 13:26:12,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:12,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227637888] [2020-08-21 13:26:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,696 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 13:26:12,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227637888] [2020-08-21 13:26:12,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:12,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:26:12,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771709279] [2020-08-21 13:26:12,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:26:12,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:26:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:26:12,723 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-21 13:26:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:13,017 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-08-21 13:26:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:26:13,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 13:26:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:13,030 INFO L225 Difference]: With dead ends: 127 [2020-08-21 13:26:13,030 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:26:13,035 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 13:26:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:26:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-08-21 13:26:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 13:26:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-08-21 13:26:13,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-08-21 13:26:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:13,084 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-08-21 13:26:13,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:26:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-08-21 13:26:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 13:26:13,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:13,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:13,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:26:13,086 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-08-21 13:26:13,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:13,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126131868] [2020-08-21 13:26:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,255 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 13:26:13,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126131868] [2020-08-21 13:26:13,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:13,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:26:13,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413491371] [2020-08-21 13:26:13,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:13,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:13,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:13,264 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-08-21 13:26:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:13,424 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-21 13:26:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:13,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-21 13:26:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:13,426 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:26:13,426 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 13:26:13,428 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 13:26:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 13:26:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-08-21 13:26:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:26:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-21 13:26:13,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-08-21 13:26:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:13,435 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-21 13:26:13,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-21 13:26:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:26:13,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:13,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:13,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:26:13,437 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-08-21 13:26:13,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:13,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380663750] [2020-08-21 13:26:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,570 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 13:26:13,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380663750] [2020-08-21 13:26:13,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:13,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:26:13,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580616727] [2020-08-21 13:26:13,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:13,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:13,575 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-21 13:26:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:13,739 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 13:26:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:13,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 13:26:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:13,742 INFO L225 Difference]: With dead ends: 48 [2020-08-21 13:26:13,742 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 13:26:13,743 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 13:26:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 13:26:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-08-21 13:26:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:26:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 13:26:13,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-08-21 13:26:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:13,756 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 13:26:13,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 13:26:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:26:13,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:13,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:13,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:26:13,757 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:13,758 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-08-21 13:26:13,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:13,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017683288] [2020-08-21 13:26:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,879 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 13:26:13,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017683288] [2020-08-21 13:26:13,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:13,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:26:13,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099079102] [2020-08-21 13:26:13,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:13,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:13,881 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-21 13:26:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:14,088 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-21 13:26:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:26:14,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-21 13:26:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:14,090 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:26:14,090 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 13:26:14,091 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 13:26:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 13:26:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-08-21 13:26:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:26:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 13:26:14,100 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-08-21 13:26:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:14,100 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 13:26:14,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 13:26:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 13:26:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:14,103 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 13:26:14,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:26:14,103 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-08-21 13:26:14,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:14,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181053946] [2020-08-21 13:26:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:26:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,238 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 13:26:14,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181053946] [2020-08-21 13:26:14,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:14,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:26:14,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726847134] [2020-08-21 13:26:14,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:14,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:14,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:14,241 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-08-21 13:26:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:14,401 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-21 13:26:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:26:14,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-21 13:26:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:14,404 INFO L225 Difference]: With dead ends: 66 [2020-08-21 13:26:14,405 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 13:26:14,405 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 13:26:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 13:26:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 13:26:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 13:26:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 13:26:14,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-08-21 13:26:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:14,414 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 13:26:14,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 13:26:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:26:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:14,416 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 13:26:14,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:26:14,416 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-08-21 13:26:14,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:14,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522640428] [2020-08-21 13:26:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:26:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,516 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 13:26:14,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522640428] [2020-08-21 13:26:14,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:14,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:26:14,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020172100] [2020-08-21 13:26:14,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:14,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:14,518 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-08-21 13:26:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:14,718 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-08-21 13:26:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:26:14,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-08-21 13:26:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:14,720 INFO L225 Difference]: With dead ends: 78 [2020-08-21 13:26:14,720 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:26:14,721 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 13:26:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:26:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 13:26:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:26:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-21 13:26:14,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-08-21 13:26:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:14,729 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-21 13:26:14,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-21 13:26:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 13:26:14,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:14,731 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 13:26:14,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:26:14,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-08-21 13:26:14,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:14,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338885776] [2020-08-21 13:26:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 13:26:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:14,837 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 13:26:14,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338885776] [2020-08-21 13:26:14,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:14,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:26:14,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198741696] [2020-08-21 13:26:14,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:26:14,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:26:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:14,839 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-08-21 13:26:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:15,011 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-08-21 13:26:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:26:15,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 13:26:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:15,013 INFO L225 Difference]: With dead ends: 90 [2020-08-21 13:26:15,013 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 13:26:15,014 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 13:26:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 13:26:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-08-21 13:26:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 13:26:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-08-21 13:26:15,025 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-08-21 13:26:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:15,025 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-08-21 13:26:15,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:26:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-08-21 13:26:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 13:26:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:15,027 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 13:26:15,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:26:15,028 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-08-21 13:26:15,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:15,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578032808] [2020-08-21 13:26:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 13:26:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,135 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 13:26:15,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578032808] [2020-08-21 13:26:15,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:15,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:26:15,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604134467] [2020-08-21 13:26:15,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:26:15,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:26:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:15,137 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2020-08-21 13:26:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:15,359 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-08-21 13:26:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:26:15,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-08-21 13:26:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:15,362 INFO L225 Difference]: With dead ends: 102 [2020-08-21 13:26:15,362 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 13:26:15,363 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 13:26:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 13:26:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-21 13:26:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 13:26:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-08-21 13:26:15,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-08-21 13:26:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:15,373 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-08-21 13:26:15,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:26:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-08-21 13:26:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:26:15,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:15,375 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 13:26:15,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:26:15,375 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-08-21 13:26:15,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:15,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884093792] [2020-08-21 13:26:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 13:26:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,497 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 13:26:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884093792] [2020-08-21 13:26:15,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:15,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:26:15,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685708687] [2020-08-21 13:26:15,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:26:15,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:15,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:26:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:26:15,499 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-08-21 13:26:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:15,723 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-08-21 13:26:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:26:15,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-08-21 13:26:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:15,724 INFO L225 Difference]: With dead ends: 108 [2020-08-21 13:26:15,725 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 13:26:15,725 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 13:26:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 13:26:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 13:26:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 13:26:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 13:26:15,735 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-08-21 13:26:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:15,735 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 13:26:15,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:26:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 13:26:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 13:26:15,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:15,737 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 13:26:15,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:26:15,737 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:15,738 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-08-21 13:26:15,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:15,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119922120] [2020-08-21 13:26:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:15,926 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 13:26:15,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119922120] [2020-08-21 13:26:15,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:15,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:26:15,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284657267] [2020-08-21 13:26:15,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:15,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:15,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:15,929 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2020-08-21 13:26:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:16,136 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-08-21 13:26:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:26:16,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 13:26:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:16,138 INFO L225 Difference]: With dead ends: 168 [2020-08-21 13:26:16,138 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 13:26:16,139 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 13:26:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 13:26:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-08-21 13:26:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:26:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-08-21 13:26:16,151 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-08-21 13:26:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:16,151 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-08-21 13:26:16,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-08-21 13:26:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 13:26:16,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:16,153 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 13:26:16,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:26:16,153 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-08-21 13:26:16,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:16,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180233139] [2020-08-21 13:26:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,260 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 13:26:16,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180233139] [2020-08-21 13:26:16,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:16,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:26:16,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262170876] [2020-08-21 13:26:16,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:16,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:16,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:16,263 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 7 states. [2020-08-21 13:26:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:16,471 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-08-21 13:26:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:26:16,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 13:26:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:16,473 INFO L225 Difference]: With dead ends: 109 [2020-08-21 13:26:16,473 INFO L226 Difference]: Without dead ends: 107 [2020-08-21 13:26:16,474 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 13:26:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-21 13:26:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-08-21 13:26:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 13:26:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-08-21 13:26:16,497 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-08-21 13:26:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:16,497 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-08-21 13:26:16,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-08-21 13:26:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-21 13:26:16,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:16,505 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 13:26:16,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:26:16,506 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-08-21 13:26:16,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:16,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541670277] [2020-08-21 13:26:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:16,686 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 13:26:16,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541670277] [2020-08-21 13:26:16,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:16,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:26:16,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457469829] [2020-08-21 13:26:16,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:26:16,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:16,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:26:16,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:16,694 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 8 states. [2020-08-21 13:26:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:16,940 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-08-21 13:26:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:26:16,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-08-21 13:26:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:16,943 INFO L225 Difference]: With dead ends: 142 [2020-08-21 13:26:16,943 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 13:26:16,943 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 13:26:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 13:26:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-08-21 13:26:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 13:26:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-08-21 13:26:16,955 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 102 [2020-08-21 13:26:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:16,956 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-08-21 13:26:16,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:26:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-08-21 13:26:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 13:26:16,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:16,958 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 13:26:16,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:26:16,958 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1572842069, now seen corresponding path program 9 times [2020-08-21 13:26:16,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:16,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568149800] [2020-08-21 13:26:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 13:26:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,138 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 13:26:17,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568149800] [2020-08-21 13:26:17,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:17,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:26:17,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711258503] [2020-08-21 13:26:17,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:26:17,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:26:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:17,141 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 9 states. [2020-08-21 13:26:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:17,497 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2020-08-21 13:26:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:26:17,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-21 13:26:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:17,499 INFO L225 Difference]: With dead ends: 239 [2020-08-21 13:26:17,499 INFO L226 Difference]: Without dead ends: 176 [2020-08-21 13:26:17,500 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 13:26:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-08-21 13:26:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-08-21 13:26:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 13:26:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-08-21 13:26:17,515 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-08-21 13:26:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:17,517 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-08-21 13:26:17,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:26:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-08-21 13:26:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 13:26:17,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:17,519 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 13:26:17,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:26:17,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 10 times [2020-08-21 13:26:17,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:17,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785198377] [2020-08-21 13:26:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 13:26:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:17,720 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 13:26:17,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785198377] [2020-08-21 13:26:17,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:17,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:26:17,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999525470] [2020-08-21 13:26:17,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:26:17,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:26:17,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:26:17,723 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 9 states. [2020-08-21 13:26:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,022 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2020-08-21 13:26:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:26:18,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-21 13:26:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,025 INFO L225 Difference]: With dead ends: 175 [2020-08-21 13:26:18,025 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 13:26:18,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:26:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 13:26:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-08-21 13:26:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-21 13:26:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-08-21 13:26:18,042 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 135 [2020-08-21 13:26:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,043 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-08-21 13:26:18,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:26:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-08-21 13:26:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-21 13:26:18,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,047 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 13:26:18,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:26:18,048 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 11 times [2020-08-21 13:26:18,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712943581] [2020-08-21 13:26:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 13:26:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 13:26:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,310 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 13:26:18,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712943581] [2020-08-21 13:26:18,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:26:18,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874889780] [2020-08-21 13:26:18,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:26:18,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:26:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:26:18,314 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 10 states. [2020-08-21 13:26:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:18,669 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2020-08-21 13:26:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:26:18,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2020-08-21 13:26:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:18,671 INFO L225 Difference]: With dead ends: 208 [2020-08-21 13:26:18,671 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 13:26:18,672 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 13:26:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 13:26:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-08-21 13:26:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-21 13:26:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-08-21 13:26:18,684 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 168 [2020-08-21 13:26:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:18,685 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-08-21 13:26:18,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:26:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-08-21 13:26:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-21 13:26:18,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:18,688 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 13:26:18,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:26:18,688 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash -886069047, now seen corresponding path program 12 times [2020-08-21 13:26:18,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:18,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137229690] [2020-08-21 13:26:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:26:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 13:26:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 13:26:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-21 13:26:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:18,871 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 13:26:18,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137229690] [2020-08-21 13:26:18,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:18,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:26:18,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298417794] [2020-08-21 13:26:18,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:18,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:18,874 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 7 states. [2020-08-21 13:26:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:19,030 INFO L93 Difference]: Finished difference Result 204 states and 240 transitions. [2020-08-21 13:26:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:26:19,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-08-21 13:26:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:19,032 INFO L225 Difference]: With dead ends: 204 [2020-08-21 13:26:19,032 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:26:19,033 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 13:26:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:26:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:26:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:26:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:26:19,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-08-21 13:26:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:19,034 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:26:19,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:26:19,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:26:19,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:26:19,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:26:19,284 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-08-21 13:26:19,284 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-08-21 13:26:19,284 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-08-21 13:26:19,284 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-08-21 13:26:19,285 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-08-21 13:26:19,285 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-08-21 13:26:19,285 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-08-21 13:26:19,285 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-08-21 13:26:19,285 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-08-21 13:26:19,285 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-08-21 13:26:19,285 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-08-21 13:26:19,286 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-08-21 13:26:19,286 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-08-21 13:26:19,286 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-08-21 13:26:19,286 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 13:26:19,286 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-08-21 13:26:19,287 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-08-21 13:26:19,287 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-08-21 13:26:19,287 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-08-21 13:26:19,287 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-21 13:26:19,287 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-08-21 13:26:19,287 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-08-21 13:26:19,288 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-08-21 13:26:19,288 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-08-21 13:26:19,288 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-08-21 13:26:19,288 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-08-21 13:26:19,288 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-08-21 13:26:19,288 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-08-21 13:26:19,288 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-08-21 13:26:19,289 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 13:26:19,289 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-08-21 13:26:19,289 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-08-21 13:26:19,289 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-08-21 13:26:19,289 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:19,290 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 13:26:19,290 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:19,290 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-08-21 13:26:19,290 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-08-21 13:26:19,290 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-08-21 13:26:19,290 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-08-21 13:26:19,291 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-08-21 13:26:19,291 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:19,291 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:26:19,291 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:26:19,291 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:19,291 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-21 13:26:19,291 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-08-21 13:26:19,292 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-08-21 13:26:19,292 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-08-21 13:26:19,292 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 13:26:19,292 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-08-21 13:26:19,292 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-08-21 13:26:19,292 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-08-21 13:26:19,293 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 13:26:19,293 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 13:26:19,293 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-08-21 13:26:19,293 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 13:26:19,293 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 13:26:19,293 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 13:26:19,294 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 13:26:19,294 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 13:26:19,294 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 13:26:19,294 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 13:26:19,294 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 13:26:19,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:19 BoogieIcfgContainer [2020-08-21 13:26:19,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:26:19,320 INFO L168 Benchmark]: Toolchain (without parser) took 8086.29 ms. Allocated memory was 140.0 MB in the beginning and 341.8 MB in the end (delta: 201.9 MB). Free memory was 103.0 MB in the beginning and 305.5 MB in the end (delta: -202.4 MB). Peak memory consumption was 176.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,321 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:26:19,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.32 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,323 INFO L168 Benchmark]: Boogie Preprocessor took 56.77 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,324 INFO L168 Benchmark]: RCFGBuilder took 557.52 ms. Allocated memory is still 201.9 MB. Free memory was 175.9 MB in the beginning and 148.2 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,324 INFO L168 Benchmark]: TraceAbstraction took 7059.68 ms. Allocated memory was 201.9 MB in the beginning and 341.8 MB in the end (delta: 140.0 MB). Free memory was 147.5 MB in the beginning and 305.5 MB in the end (delta: -157.9 MB). Peak memory consumption was 159.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:19,328 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 407.32 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.77 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 175.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 557.52 ms. Allocated memory is still 201.9 MB. Free memory was 175.9 MB in the beginning and 148.2 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7059.68 ms. Allocated memory was 201.9 MB in the beginning and 341.8 MB in the end (delta: 140.0 MB). Free memory was 147.5 MB in the beginning and 305.5 MB in the end (delta: -157.9 MB). Peak memory consumption was 159.5 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: 6.6s, OverallIterations: 16, TraceHistogramMax: 36, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 467 SDslu, 506 SDs, 0 SdLazy, 1311 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.3s 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: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 142 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 65 PreInvPairs, 141 NumberOfFragments, 96 HoareAnnotationTreeSize, 65 FomulaSimplifications, 2732 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s 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...