/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:23,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:23,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:23,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:23,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:23,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:23,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:23,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:23,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:23,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:23,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:23,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:23,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:23,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:23,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:23,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:23,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:23,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:23,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:23,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:23,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:23,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:23,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:23,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:23,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:20:23,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:20:23,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:20:23,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:20:23,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:20:23,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:20:23,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:20:23,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:20:23,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:20:23,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:20:23,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:20:23,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:20:23,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:20:23,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:20:23,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:23,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:23,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:23,386 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 [2020-09-24 17:20:23,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:23,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:23,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:23,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:23,433 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:23,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:23,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:23,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:23,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:23,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:23,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:23,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:23,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:23,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:23,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:23,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:23,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:23,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:23,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:23,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:23,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:23,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:23,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:23,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:23,440 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:20:23,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:23,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:23,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:23,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:23,938 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:23,940 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 17:20:24,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118752437/94a074d6b03b40a89ed15b12a7c6400f/FLAG5728ad9a7 [2020-09-24 17:20:24,566 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:24,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 17:20:24,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118752437/94a074d6b03b40a89ed15b12a7c6400f/FLAG5728ad9a7 [2020-09-24 17:20:24,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/118752437/94a074d6b03b40a89ed15b12a7c6400f [2020-09-24 17:20:24,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:24,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:24,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:24,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:24,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:24,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:24" (1/1) ... [2020-09-24 17:20:24,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6017e0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:24, skipping insertion in model container [2020-09-24 17:20:24,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:24" (1/1) ... [2020-09-24 17:20:24,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:24,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:25,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:25,226 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:25,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:25,395 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:25,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25 WrapperNode [2020-09-24 17:20:25,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:25,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:25,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:25,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:25,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (1/1) ... [2020-09-24 17:20:25,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:25,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:25,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:25,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:25,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (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 [2020-09-24 17:20:25,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:25,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:25,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:25,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-09-24 17:20:25,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:25,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-09-24 17:20:25,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:25,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:25,540 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-09-24 17:20:25,541 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-09-24 17:20:25,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:25,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 17:20:25,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 17:20:25,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:20:25,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:20:25,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:25,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:26,105 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:26,105 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-24 17:20:26,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:26 BoogieIcfgContainer [2020-09-24 17:20:26,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:26,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:26,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:26,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:26,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:24" (1/3) ... [2020-09-24 17:20:26,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee58ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:26, skipping insertion in model container [2020-09-24 17:20:26,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:25" (2/3) ... [2020-09-24 17:20:26,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee58ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:26, skipping insertion in model container [2020-09-24 17:20:26,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:26" (3/3) ... [2020-09-24 17:20:26,123 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-09-24 17:20:26,135 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:26,146 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:26,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:26,196 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:26,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:26,196 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:26,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:26,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:26,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:26,197 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:26,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-09-24 17:20:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 17:20:26,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:26,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:26,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:26,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1445504148, now seen corresponding path program 1 times [2020-09-24 17:20:26,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:26,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597223844] [2020-09-24 17:20:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:27,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:27,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:27,350 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:27,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 17:20:27,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:20:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-09-24 17:20:27,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:27,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:20:27,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 17:20:27,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:27,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:27,480 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:27,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 17:20:27,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:20:27,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:27,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597223844] [2020-09-24 17:20:27,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:27,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 17:20:27,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239508836] [2020-09-24 17:20:27,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:20:27,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:20:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:27,528 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 6 states. [2020-09-24 17:20:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:28,226 INFO L93 Difference]: Finished difference Result 373 states and 442 transitions. [2020-09-24 17:20:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:28,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-24 17:20:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:28,243 INFO L225 Difference]: With dead ends: 373 [2020-09-24 17:20:28,243 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 17:20:28,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 17:20:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-09-24 17:20:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 17:20:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-09-24 17:20:28,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 30 [2020-09-24 17:20:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:28,330 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-09-24 17:20:28,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:20:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-09-24 17:20:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 17:20:28,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:28,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:28,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:28,332 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -905808642, now seen corresponding path program 1 times [2020-09-24 17:20:28,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:28,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661904473] [2020-09-24 17:20:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:28,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:28,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:29,326 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:29,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:20:29,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:20:29,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-09-24 17:20:29,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 17:20:29,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:20:29,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:29,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:29,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:29,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 17:20:29,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:29,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 17:20:29,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:29,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:29,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:29,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:29,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:29,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661904473] [2020-09-24 17:20:29,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:29,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:20:29,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853843136] [2020-09-24 17:20:29,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:20:29,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:20:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:20:29,480 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2020-09-24 17:20:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:30,104 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-09-24 17:20:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:20:30,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-24 17:20:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:30,107 INFO L225 Difference]: With dead ends: 98 [2020-09-24 17:20:30,108 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 17:20:30,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:20:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 17:20:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2020-09-24 17:20:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 17:20:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-09-24 17:20:30,132 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 39 [2020-09-24 17:20:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:30,132 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-09-24 17:20:30,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:20:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-09-24 17:20:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 17:20:30,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:30,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:30,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:30,136 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1270331381, now seen corresponding path program 1 times [2020-09-24 17:20:30,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:30,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732522534] [2020-09-24 17:20:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:30,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:30,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:43,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:51,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:51,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 17:20:51,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 17:20:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21353 [2020-09-24 17:20:51,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:51,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:51,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 17:20:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 17:20:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:51,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:51,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:51,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 17:20:51,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:20:51,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:51,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 17:20:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:51,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:51,674 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:51,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:20:51,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:20:51,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:20:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:20:51,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:51,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732522534] [2020-09-24 17:20:51,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:51,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:20:51,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290317382] [2020-09-24 17:20:51,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:20:51,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:20:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:20:51,693 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 10 states. [2020-09-24 17:20:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:52,071 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2020-09-24 17:20:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:52,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-24 17:20:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:52,079 INFO L225 Difference]: With dead ends: 179 [2020-09-24 17:20:52,080 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 17:20:52,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 17:20:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-09-24 17:20:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 17:20:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-09-24 17:20:52,107 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 70 [2020-09-24 17:20:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:52,110 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-09-24 17:20:52,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:20:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-09-24 17:20:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 17:20:52,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:52,124 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:52,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:52,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash -453056611, now seen corresponding path program 2 times [2020-09-24 17:20:52,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:52,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981975000] [2020-09-24 17:20:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:52,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:53,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:55,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:55,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:55,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:59,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking...