/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:05:50,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:05:50,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:05:50,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:05:50,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:05:50,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:05:50,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:05:50,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:05:50,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:05:50,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:05:50,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:05:50,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:05:50,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:05:50,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:05:50,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:05:50,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:05:50,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:05:50,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:05:50,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:05:50,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:05:50,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:05:50,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:05:50,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:05:50,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:05:50,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:05:50,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:05:50,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:05:50,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:05:50,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:05:50,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:05:50,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:05:50,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:05:50,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:05:50,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:05:50,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:05:50,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:05:50,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:05:50,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:05:50,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:05:50,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:05:50,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:05:50,437 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 [2020-09-25 11:05:50,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:05:50,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:05:50,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:05:50,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:05:50,466 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:05:50,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:05:50,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:05:50,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:05:50,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:05:50,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:05:50,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:05:50,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:05:50,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:05:50,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:05:50,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:05:50,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:05:50,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:05:50,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:05:50,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:05:50,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:05:50,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:05:50,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:05:50,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:05:50,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:05:50,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:05:50,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:05:50,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:05:50,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:05:50,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:05:50,471 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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:05:50,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:05:50,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:05:50,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:05:50,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:05:50,974 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:05:50,975 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 11:05:51,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27738692/7622f6fcfe9b4f2993803b4cf725405c/FLAG85113348e [2020-09-25 11:05:51,652 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:05:51,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 11:05:51,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27738692/7622f6fcfe9b4f2993803b4cf725405c/FLAG85113348e [2020-09-25 11:05:51,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27738692/7622f6fcfe9b4f2993803b4cf725405c [2020-09-25 11:05:52,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:05:52,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:05:52,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:05:52,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:05:52,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:05:52,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:05:51" (1/1) ... [2020-09-25 11:05:52,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674884e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52, skipping insertion in model container [2020-09-25 11:05:52,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:05:51" (1/1) ... [2020-09-25 11:05:52,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:05:52,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:05:52,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:05:52,304 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:05:52,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:05:52,356 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:05:52,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52 WrapperNode [2020-09-25 11:05:52,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:05:52,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:05:52,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:05:52,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:05:52,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (1/1) ... [2020-09-25 11:05:52,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:05:52,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:05:52,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:05:52,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:05:52,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (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 [2020-09-25 11:05:52,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:05:52,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:05:52,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:05:52,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:05:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:05:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:05:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:05:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:05:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:05:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:05:52,964 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:05:52,965 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:05:52,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:05:52 BoogieIcfgContainer [2020-09-25 11:05:52,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:05:52,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:05:52,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:05:52,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:05:52,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:05:51" (1/3) ... [2020-09-25 11:05:52,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb7058f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:05:52, skipping insertion in model container [2020-09-25 11:05:52,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:52" (2/3) ... [2020-09-25 11:05:52,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb7058f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:05:52, skipping insertion in model container [2020-09-25 11:05:52,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:05:52" (3/3) ... [2020-09-25 11:05:52,981 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-25 11:05:52,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:05:53,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:05:53,030 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:05:53,064 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:05:53,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:05:53,064 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:05:53,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:05:53,064 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:05:53,065 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:05:53,065 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:05:53,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:05:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-25 11:05:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 11:05:53,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:53,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:05:53,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-25 11:05:53,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:53,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519355227] [2020-09-25 11:05:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:53,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:53,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:05:53,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:53,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-25 11:05:53,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:53,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:05:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:53,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:05:53,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:05:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:53,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:53,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:05:53,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:05:53,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:53,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:05:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:05:53,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519355227] [2020-09-25 11:05:53,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:05:53,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 11:05:53,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641956026] [2020-09-25 11:05:53,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 11:05:53,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:05:53,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 11:05:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:05:53,426 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-25 11:05:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:05:53,460 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-25 11:05:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 11:05:53,462 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 11:05:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:05:53,474 INFO L225 Difference]: With dead ends: 62 [2020-09-25 11:05:53,475 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 11:05:53,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:05:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 11:05:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-25 11:05:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 11:05:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-25 11:05:53,537 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-25 11:05:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:05:53,538 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-25 11:05:53,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 11:05:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-25 11:05:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 11:05:53,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:53,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:05:53,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:05:53,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-25 11:05:53,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:53,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740214098] [2020-09-25 11:05:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:53,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:53,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:05:53,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:53,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 11:05:53,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:53,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:05:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:05:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:05:53,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:05:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:53,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:53,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:05:53,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:53,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:05:53,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:53,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:05:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:05:53,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740214098] [2020-09-25 11:05:53,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:05:53,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 11:05:53,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010334470] [2020-09-25 11:05:53,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 11:05:53,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:05:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 11:05:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:05:53,808 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-25 11:05:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:05:53,888 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-25 11:05:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 11:05:53,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 11:05:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:05:53,891 INFO L225 Difference]: With dead ends: 55 [2020-09-25 11:05:53,891 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 11:05:53,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:05:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 11:05:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-25 11:05:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 11:05:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-25 11:05:53,902 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-25 11:05:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:05:53,902 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-25 11:05:53,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 11:05:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-25 11:05:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:05:53,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:53,904 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] [2020-09-25 11:05:53,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:05:53,905 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-25 11:05:53,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:53,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974093844] [2020-09-25 11:05:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:53,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:55,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:05:55,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 11:05:55,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-09-25 11:05:55,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:55,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:05:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:05:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:05:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:05:55,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:05:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:55,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:55,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:55,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:05:55,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:55,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:05:55,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:55,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:05:55,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:05:55,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974093844] [2020-09-25 11:05:55,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:05:55,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:05:55,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350510678] [2020-09-25 11:05:55,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:05:55,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:05:55,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:05:55,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:05:55,849 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 13 states. [2020-09-25 11:05:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:05:57,924 INFO L93 Difference]: Finished difference Result 385 states and 509 transitions. [2020-09-25 11:05:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:05:57,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 11:05:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:05:57,932 INFO L225 Difference]: With dead ends: 385 [2020-09-25 11:05:57,932 INFO L226 Difference]: Without dead ends: 380 [2020-09-25 11:05:57,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:05:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-25 11:05:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 297. [2020-09-25 11:05:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-25 11:05:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 395 transitions. [2020-09-25 11:05:57,966 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 395 transitions. Word has length 33 [2020-09-25 11:05:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:05:57,967 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 395 transitions. [2020-09-25 11:05:57,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:05:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 395 transitions. [2020-09-25 11:05:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:05:57,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:57,970 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] [2020-09-25 11:05:57,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:05:57,971 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:57,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2068476932, now seen corresponding path program 1 times [2020-09-25 11:05:57,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:57,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546723750] [2020-09-25 11:05:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:57,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:59,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:05:59,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-09-25 11:05:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-09-25 11:05:59,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:59,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:05:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:05:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:05:59,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:05:59,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:05:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:59,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:59,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:59,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:05:59,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:05:59,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:59,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:05:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-09-25 11:05:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:05:59,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546723750] [2020-09-25 11:05:59,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:05:59,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:05:59,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778202833] [2020-09-25 11:05:59,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:05:59,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:05:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:05:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:05:59,811 INFO L87 Difference]: Start difference. First operand 297 states and 395 transitions. Second operand 13 states. [2020-09-25 11:06:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:06:01,389 INFO L93 Difference]: Finished difference Result 591 states and 781 transitions. [2020-09-25 11:06:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:06:01,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 11:06:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:06:01,394 INFO L225 Difference]: With dead ends: 591 [2020-09-25 11:06:01,395 INFO L226 Difference]: Without dead ends: 586 [2020-09-25 11:06:01,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:06:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-09-25 11:06:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 467. [2020-09-25 11:06:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-09-25 11:06:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2020-09-25 11:06:01,456 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 33 [2020-09-25 11:06:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:06:01,456 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2020-09-25 11:06:01,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:06:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2020-09-25 11:06:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:06:01,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:06:01,466 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] [2020-09-25 11:06:01,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:06:01,466 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:06:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:06:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1539703076, now seen corresponding path program 1 times [2020-09-25 11:06:01,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:06:01,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162650336] [2020-09-25 11:06:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:06:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:01,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:02,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:02,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:06:02,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-09-25 11:06:02,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-09-25 11:06:02,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:02,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:06:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:06:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:06:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:32,042 WARN L193 SmtUtils]: Spent 18.81 s on a formula simplification. DAG size of input: 118 DAG size of output: 28 [2020-09-25 11:06:32,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:06:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:32,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:32,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:32,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:06:32,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:06:32,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:06:32,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:32,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:06:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:06:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:06:32,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:06:32,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162650336] [2020-09-25 11:06:32,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:06:32,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:06:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654507031] [2020-09-25 11:06:32,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:06:32,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:06:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:06:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=100, Unknown=5, NotChecked=0, Total=132 [2020-09-25 11:06:32,112 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand 12 states. [2020-09-25 11:06:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:06:33,124 INFO L93 Difference]: Finished difference Result 1065 states and 1434 transitions. [2020-09-25 11:06:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:06:33,125 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-09-25 11:06:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:06:33,129 INFO L225 Difference]: With dead ends: 1065 [2020-09-25 11:06:33,129 INFO L226 Difference]: Without dead ends: 602 [2020-09-25 11:06:33,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=35, Invalid=142, Unknown=5, NotChecked=0, Total=182 [2020-09-25 11:06:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-09-25 11:06:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 576. [2020-09-25 11:06:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-09-25 11:06:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 776 transitions. [2020-09-25 11:06:33,151 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 776 transitions. Word has length 33 [2020-09-25 11:06:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:06:33,152 INFO L479 AbstractCegarLoop]: Abstraction has 576 states and 776 transitions. [2020-09-25 11:06:33,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:06:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 776 transitions. [2020-09-25 11:06:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:06:33,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:06:33,154 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] [2020-09-25 11:06:33,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:06:33,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:06:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:06:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash -243170692, now seen corresponding path program 1 times [2020-09-25 11:06:33,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:06:33,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488540878] [2020-09-25 11:06:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:06:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:33,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:34,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:06:34,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-09-25 11:06:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-09-25 11:06:34,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:34,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:06:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:06:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:06:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:34,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:06:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:34,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:34,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:06:34,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:06:34,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:06:34,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:34,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:06:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:06:34,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:06:34,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:06:34,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488540878] [2020-09-25 11:06:34,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:06:34,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:06:34,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776168683] [2020-09-25 11:06:34,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:06:34,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:06:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:06:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:06:34,965 INFO L87 Difference]: Start difference. First operand 576 states and 776 transitions. Second operand 7 states. [2020-09-25 11:06:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:06:35,387 INFO L93 Difference]: Finished difference Result 689 states and 925 transitions. [2020-09-25 11:06:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:06:35,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 11:06:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:06:35,393 INFO L225 Difference]: With dead ends: 689 [2020-09-25 11:06:35,394 INFO L226 Difference]: Without dead ends: 684 [2020-09-25 11:06:35,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:06:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-09-25 11:06:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 628. [2020-09-25 11:06:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-09-25 11:06:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 849 transitions. [2020-09-25 11:06:35,418 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 849 transitions. Word has length 33 [2020-09-25 11:06:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:06:35,420 INFO L479 AbstractCegarLoop]: Abstraction has 628 states and 849 transitions. [2020-09-25 11:06:35,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:06:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 849 transitions. [2020-09-25 11:06:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:06:35,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:06:35,422 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] [2020-09-25 11:06:35,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:06:35,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:06:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:06:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1983671876, now seen corresponding path program 1 times [2020-09-25 11:06:35,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:06:35,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087052983] [2020-09-25 11:06:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:06:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:35,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:36,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:36,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:36,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:36,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:06:36,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-09-25 11:06:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-09-25 11:06:36,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:36,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:06:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:06:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:06:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:06:41,760 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 63 DAG size of output: 11 [2020-09-25 11:06:48,420 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 130 DAG size of output: 28 [2020-09-25 11:06:48,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:06:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:48,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:48,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:06:48,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:06:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:06:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:06:48,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087052983] [2020-09-25 11:06:48,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:06:48,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:06:48,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974431354] [2020-09-25 11:06:48,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:06:48,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:06:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:06:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:06:48,461 INFO L87 Difference]: Start difference. First operand 628 states and 849 transitions. Second operand 11 states. [2020-09-25 11:06:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:06:49,068 INFO L93 Difference]: Finished difference Result 735 states and 994 transitions. [2020-09-25 11:06:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:06:49,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-09-25 11:06:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:06:49,073 INFO L225 Difference]: With dead ends: 735 [2020-09-25 11:06:49,074 INFO L226 Difference]: Without dead ends: 154 [2020-09-25 11:06:49,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:06:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-25 11:06:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2020-09-25 11:06:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 11:06:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2020-09-25 11:06:49,081 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 33 [2020-09-25 11:06:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:06:49,082 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2020-09-25 11:06:49,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:06:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2020-09-25 11:06:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:06:49,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:06:49,083 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] [2020-09-25 11:06:49,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:06:49,084 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:06:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:06:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1873408444, now seen corresponding path program 1 times [2020-09-25 11:06:49,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:06:49,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283054905] [2020-09-25 11:06:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:06:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:49,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:50,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:06:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 11:06:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-09-25 11:06:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:50,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:06:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:06:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:06:50,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:50,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:06:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:06:50,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:06:50,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:06:50,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:06:50,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:06:50,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:06:50,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:06:50,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:06:50,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:06:50,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:06:50,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:06:50,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:06:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:06:50,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283054905] [2020-09-25 11:06:50,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:06:50,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:06:50,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148613938] [2020-09-25 11:06:50,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:06:50,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:06:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:06:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:06:50,321 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand 8 states. [2020-09-25 11:06:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:06:50,892 INFO L93 Difference]: Finished difference Result 290 states and 366 transitions. [2020-09-25 11:06:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:06:50,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 11:06:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:06:50,897 INFO L225 Difference]: With dead ends: 290 [2020-09-25 11:06:50,897 INFO L226 Difference]: Without dead ends: 252 [2020-09-25 11:06:50,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:06:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-25 11:06:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 136. [2020-09-25 11:06:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-25 11:06:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-09-25 11:06:50,905 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 33 [2020-09-25 11:06:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:06:50,905 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-09-25 11:06:50,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:06:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-09-25 11:06:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:06:50,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:06:50,906 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] [2020-09-25 11:06:50,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:06:50,907 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:06:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:06:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-25 11:06:50,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:06:50,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089351778] [2020-09-25 11:06:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:06:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:06:50,922 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:06:50,922 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:06:50,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:06:50,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:06:50 BoogieIcfgContainer [2020-09-25 11:06:50,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:06:50,952 INFO L168 Benchmark]: Toolchain (without parser) took 58947.69 ms. Allocated memory was 138.4 MB in the beginning and 364.9 MB in the end (delta: 226.5 MB). Free memory was 101.9 MB in the beginning and 319.4 MB in the end (delta: -217.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,953 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.06 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,955 INFO L168 Benchmark]: Boogie Preprocessor took 135.12 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 179.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,956 INFO L168 Benchmark]: RCFGBuilder took 477.22 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 162.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,956 INFO L168 Benchmark]: TraceAbstraction took 57978.05 ms. Allocated memory was 201.9 MB in the beginning and 364.9 MB in the end (delta: 163.1 MB). Free memory was 162.2 MB in the beginning and 319.4 MB in the end (delta: -157.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:06:50,960 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.06 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.12 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 179.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 477.22 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 162.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 57978.05 ms. Allocated memory was 201.9 MB in the beginning and 364.9 MB in the end (delta: 163.1 MB). Free memory was 162.2 MB in the beginning and 319.4 MB in the end (delta: -157.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 57.8s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 754 SDtfs, 682 SDslu, 4436 SDs, 0 SdLazy, 5774 SolverSat, 512 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 42.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=628occurred in iteration=6, 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, 8 MinimizatonAttempts, 454 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 50.7s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 49720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6 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 incorrect! Received shutdown request...