/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res1of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:41:14,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:41:14,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:41:14,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:41:14,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:41:14,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:41:14,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:41:14,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:41:14,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:41:14,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:41:14,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:41:14,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:41:14,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:41:14,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:41:14,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:41:14,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:41:14,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:41:14,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:41:14,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:41:14,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:41:14,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:41:14,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:41:14,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:41:14,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:41:14,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:41:14,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:41:14,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:41:14,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:41:14,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:41:14,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:41:14,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:41:14,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:41:14,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:41:14,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:41:14,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:41:14,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:41:14,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:41:14,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:41:14,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:41:14,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:41:14,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:41:14,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:41:14,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:41:14,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:41:14,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:41:14,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:41:14,543 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:41:14,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:41:14,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:41:14,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:41:14,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:41:14,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:41:14,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:41:14,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:41:14,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:41:14,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:41:14,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:41:14,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:41:14,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:41:14,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:41:14,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:41:14,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:41:14,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:41:14,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:14,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:41:14,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:41:14,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:41:14,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:41:14,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:41:14,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:41:14,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:41:14,549 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:41:14,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:41:15,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:41:15,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:41:15,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:41:15,036 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:41:15,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1of.c [2020-09-24 20:41:15,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/523416f91/e4e83e0dbf6547bca2c821afd46f215a/FLAG4a95569fc [2020-09-24 20:41:15,711 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:41:15,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1of.c [2020-09-24 20:41:15,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/523416f91/e4e83e0dbf6547bca2c821afd46f215a/FLAG4a95569fc [2020-09-24 20:41:16,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/523416f91/e4e83e0dbf6547bca2c821afd46f215a [2020-09-24 20:41:16,058 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:41:16,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:41:16,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:16,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:41:16,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:41:16,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d5df5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16, skipping insertion in model container [2020-09-24 20:41:16,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:41:16,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:41:16,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:16,364 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:41:16,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:16,403 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:41:16,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16 WrapperNode [2020-09-24 20:41:16,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:16,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:41:16,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:41:16,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:41:16,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... [2020-09-24 20:41:16,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:41:16,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:41:16,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:41:16,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:41:16,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:16,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:41:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:41:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:41:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:41:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:41:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:41:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:41:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:41:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:41:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:41:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:41:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:41:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:41:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:41:16,980 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:41:16,980 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 20:41:16,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:16 BoogieIcfgContainer [2020-09-24 20:41:16,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:41:16,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:41:16,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:41:16,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:41:16,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:41:16" (1/3) ... [2020-09-24 20:41:16,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1cb2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:16, skipping insertion in model container [2020-09-24 20:41:16,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:16" (2/3) ... [2020-09-24 20:41:16,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1cb2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:16, skipping insertion in model container [2020-09-24 20:41:16,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:16" (3/3) ... [2020-09-24 20:41:16,997 INFO L109 eAbstractionObserver]: Analyzing ICFG res1of.c [2020-09-24 20:41:17,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:41:17,022 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:41:17,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:41:17,077 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:41:17,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:41:17,078 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:41:17,078 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:41:17,078 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:41:17,078 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:41:17,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:41:17,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:41:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-24 20:41:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 20:41:17,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:17,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:17,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1485233439, now seen corresponding path program 1 times [2020-09-24 20:41:17,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:17,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984120400] [2020-09-24 20:41:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:18,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:18,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 20:41:18,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:41:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-09-24 20:41:18,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:41:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 20:41:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 20:41:18,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:41:18,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:18,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:18,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:18,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:41:18,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:18,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:18,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:18,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:18,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:18,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:18,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 20:41:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:41:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:41:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984120400] [2020-09-24 20:41:18,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:18,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:41:18,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126068] [2020-09-24 20:41:18,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:41:18,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:41:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:41:18,622 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 8 states. [2020-09-24 20:41:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:19,196 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2020-09-24 20:41:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:41:19,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-09-24 20:41:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:19,210 INFO L225 Difference]: With dead ends: 160 [2020-09-24 20:41:19,210 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 20:41:19,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:41:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 20:41:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-09-24 20:41:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 20:41:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-09-24 20:41:19,266 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 37 [2020-09-24 20:41:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:19,267 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-09-24 20:41:19,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:41:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-09-24 20:41:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 20:41:19,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:19,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:19,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:41:19,270 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1830842721, now seen corresponding path program 1 times [2020-09-24 20:41:19,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:19,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173717193] [2020-09-24 20:41:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:20,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:21,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:21,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 20:41:21,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:41:21,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2604 [2020-09-24 20:41:21,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:21,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:41:21,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 20:41:21,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 20:41:21,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 20:41:22,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:22,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:22,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:41:22,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:22,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:22,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:22,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:22,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:22,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:22,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173717193] [2020-09-24 20:41:22,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:22,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:41:22,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78909448] [2020-09-24 20:41:22,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:41:22,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:22,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:41:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:41:22,097 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 10 states. [2020-09-24 20:41:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:22,534 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-09-24 20:41:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:41:22,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-09-24 20:41:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:22,537 INFO L225 Difference]: With dead ends: 98 [2020-09-24 20:41:22,537 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 20:41:22,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:41:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 20:41:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2020-09-24 20:41:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 20:41:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-24 20:41:22,550 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 42 [2020-09-24 20:41:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:22,550 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-24 20:41:22,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:41:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-24 20:41:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 20:41:22,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:22,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:22,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:41:22,553 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1563324654, now seen corresponding path program 1 times [2020-09-24 20:41:22,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:22,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667400108] [2020-09-24 20:41:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:23,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:23,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:41:23,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 20:41:23,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-09-24 20:41:23,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:23,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:41:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:41:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:41:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:23,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:23,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:23,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:41:23,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:23,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:23,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:23,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:23,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:23,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:23,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:23,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:23,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667400108] [2020-09-24 20:41:23,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:23,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:41:23,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986300237] [2020-09-24 20:41:23,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:41:23,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:41:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:41:23,838 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 6 states. [2020-09-24 20:41:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:24,218 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-09-24 20:41:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:41:24,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-24 20:41:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:24,220 INFO L225 Difference]: With dead ends: 138 [2020-09-24 20:41:24,220 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 20:41:24,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:41:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 20:41:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-24 20:41:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 20:41:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-09-24 20:41:24,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 46 [2020-09-24 20:41:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:24,231 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-09-24 20:41:24,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:41:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-09-24 20:41:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 20:41:24,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:24,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:24,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:41:24,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1464656724, now seen corresponding path program 1 times [2020-09-24 20:41:24,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:24,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536446445] [2020-09-24 20:41:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:28,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:29,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:29,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 20:41:29,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 20:41:29,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 20:41:29,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 20:41:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:41:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 20:41:29,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:30,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:30,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:30,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:30,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:41:30,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:30,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:30,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:30,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:30,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:30,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:30,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:30,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:30,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:30,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:30,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:30,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536446445] [2020-09-24 20:41:30,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:30,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 20:41:30,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164918841] [2020-09-24 20:41:30,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 20:41:30,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 20:41:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:41:30,388 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 23 states. [2020-09-24 20:41:31,270 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-09-24 20:41:31,798 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-09-24 20:41:31,988 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-09-24 20:41:32,203 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-09-24 20:41:32,361 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-09-24 20:41:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:33,615 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-24 20:41:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 20:41:33,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-24 20:41:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:33,617 INFO L225 Difference]: With dead ends: 89 [2020-09-24 20:41:33,617 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 20:41:33,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 20:41:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 20:41:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-09-24 20:41:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 20:41:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-24 20:41:33,638 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 51 [2020-09-24 20:41:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:33,640 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-24 20:41:33,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 20:41:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-24 20:41:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 20:41:33,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:33,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:41:33,644 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash 258466900, now seen corresponding path program 1 times [2020-09-24 20:41:33,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:33,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551152067] [2020-09-24 20:41:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:33,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:34,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:36,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:38,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:38,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:41:38,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 20:41:38,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 20:41:38,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:38,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 20:41:38,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:41:38,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 20:41:38,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:39,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:39,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:39,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:39,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:39,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:41:39,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:39,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:39,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:39,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:39,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:39,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:39,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:39,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:39,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551152067] [2020-09-24 20:41:39,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:39,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 20:41:39,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412160001] [2020-09-24 20:41:39,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 20:41:39,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 20:41:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-09-24 20:41:39,719 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 24 states. [2020-09-24 20:41:40,576 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-09-24 20:41:41,022 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-09-24 20:41:41,206 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-09-24 20:41:41,412 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-09-24 20:41:41,609 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-09-24 20:41:41,756 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-09-24 20:41:43,565 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-09-24 20:41:43,961 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-09-24 20:41:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:44,209 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-09-24 20:41:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 20:41:44,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-09-24 20:41:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:44,213 INFO L225 Difference]: With dead ends: 110 [2020-09-24 20:41:44,213 INFO L226 Difference]: Without dead ends: 104 [2020-09-24 20:41:44,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 20:41:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-24 20:41:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2020-09-24 20:41:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 20:41:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-09-24 20:41:44,227 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 56 [2020-09-24 20:41:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:44,227 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-09-24 20:41:44,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 20:41:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-09-24 20:41:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 20:41:44,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:44,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:44,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:41:44,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash 243993151, now seen corresponding path program 2 times [2020-09-24 20:41:44,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:44,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555093560] [2020-09-24 20:41:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:45,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:47,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:47,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 20:41:47,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:41:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3606 [2020-09-24 20:41:47,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:41:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:41:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:41:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:47,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:47,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:47,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:47,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:47,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:41:47,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:47,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:47,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:47,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:47,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555093560] [2020-09-24 20:41:47,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:47,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:41:47,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179851080] [2020-09-24 20:41:47,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:41:47,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:47,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:41:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:41:47,985 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 10 states. [2020-09-24 20:41:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:48,462 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2020-09-24 20:41:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:41:48,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-24 20:41:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:48,465 INFO L225 Difference]: With dead ends: 190 [2020-09-24 20:41:48,466 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 20:41:48,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:41:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 20:41:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 101. [2020-09-24 20:41:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 20:41:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-09-24 20:41:48,499 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 60 [2020-09-24 20:41:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:48,500 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-09-24 20:41:48,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:41:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-09-24 20:41:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 20:41:48,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:48,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:48,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:41:48,502 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash 384934167, now seen corresponding path program 3 times [2020-09-24 20:41:48,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:48,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764859336] [2020-09-24 20:41:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:48,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:48,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:48,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:49,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:51,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:53,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:53,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 20:41:53,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-24 20:41:53,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 20:41:53,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:53,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 20:41:53,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:41:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:41:53,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:54,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:41:54,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:54,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:41:54,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:54,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:41:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:54,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:41:54,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:41:54,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:54,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:54,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:54,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764859336] [2020-09-24 20:41:54,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:54,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 20:41:54,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902100345] [2020-09-24 20:41:54,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 20:41:54,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 20:41:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-09-24 20:41:55,001 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 30 states. [2020-09-24 20:41:56,375 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-09-24 20:41:56,607 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-09-24 20:41:57,044 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-09-24 20:41:57,219 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-09-24 20:41:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:58,901 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-09-24 20:41:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 20:41:58,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-09-24 20:41:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:58,904 INFO L225 Difference]: With dead ends: 125 [2020-09-24 20:41:58,904 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 20:41:58,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=863, Invalid=3559, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 20:41:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 20:41:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-09-24 20:41:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 20:41:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-09-24 20:41:58,930 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 65 [2020-09-24 20:41:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:58,930 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-09-24 20:41:58,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 20:41:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-09-24 20:41:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 20:41:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:58,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:58,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:41:58,932 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 499886001, now seen corresponding path program 1 times [2020-09-24 20:41:58,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:58,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20398000] [2020-09-24 20:41:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:41:58,954 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:41:58,954 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:41:58,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:41:58,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:41:58 BoogieIcfgContainer [2020-09-24 20:41:58,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:41:58,988 INFO L168 Benchmark]: Toolchain (without parser) took 42928.11 ms. Allocated memory was 144.7 MB in the beginning and 440.4 MB in the end (delta: 295.7 MB). Free memory was 101.2 MB in the beginning and 330.1 MB in the end (delta: -229.0 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:41:58,988 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 20:41:58,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.91 ms. Allocated memory is still 144.7 MB. Free memory was 100.5 MB in the beginning and 89.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:41:58,990 INFO L168 Benchmark]: Boogie Preprocessor took 143.15 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 89.9 MB in the beginning and 179.7 MB in the end (delta: -89.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:41:58,991 INFO L168 Benchmark]: RCFGBuilder took 438.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 158.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:41:58,992 INFO L168 Benchmark]: TraceAbstraction took 41997.40 ms. Allocated memory was 202.4 MB in the beginning and 440.4 MB in the end (delta: 238.0 MB). Free memory was 158.3 MB in the beginning and 330.1 MB in the end (delta: -171.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:41:58,995 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.91 ms. Allocated memory is still 144.7 MB. Free memory was 100.5 MB in the beginning and 89.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.15 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 89.9 MB in the beginning and 179.7 MB in the end (delta: -89.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 158.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41997.40 ms. Allocated memory was 202.4 MB in the beginning and 440.4 MB in the end (delta: 238.0 MB). Free memory was 158.3 MB in the beginning and 330.1 MB in the end (delta: -171.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L28] int *b = malloc(sizeof(int)*N); [L30] sum[0] = 0 [L31] i=0 [L31] COND TRUE i