/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=SHALLOWEST --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/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:02:56,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:02:56,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:02:56,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:02:56,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:02:56,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:02:56,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:02:56,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:02:56,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:02:56,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:02:56,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:02:56,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:02:56,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:02:56,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:02:56,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:02:56,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:02:56,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:02:56,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:02:56,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:02:56,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:02:56,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:02:56,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:02:56,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:02:56,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:02:56,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:02:56,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:02:56,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:02:56,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:02:56,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:02:56,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:02:56,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:02:56,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:02:56,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:02:56,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:02:56,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:02:56,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:02:56,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:02:56,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:02:56,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:02:56,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:02:56,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:02:56,418 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 00:02:56,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:02:56,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:02:56,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:02:56,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:02:56,466 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:02:56,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:02:56,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:02:56,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:02:56,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:02:56,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:02:56,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:02:56,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:02:56,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:02:56,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:02:56,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:02:56,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:02:56,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:02:56,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:02:56,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:02:56,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:02:56,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:02:56,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:02:56,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:02:56,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:02:56,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:02:56,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:02:56,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:02:56,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:02:56,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:02:56,473 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:02:56,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:02:56,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:02:56,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:02:56,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:02:56,956 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:02:56,958 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-25 00:02:57,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b6831395/fa9094a56035467c9ac59ed5abdcb0d3/FLAG0ff1e5d9f [2020-09-25 00:02:57,598 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:02:57,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-25 00:02:57,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b6831395/fa9094a56035467c9ac59ed5abdcb0d3/FLAG0ff1e5d9f [2020-09-25 00:02:57,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b6831395/fa9094a56035467c9ac59ed5abdcb0d3 [2020-09-25 00:02:57,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:02:57,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:02:57,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:57,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:02:57,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:02:57,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:57" (1/1) ... [2020-09-25 00:02:57,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629af9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:57, skipping insertion in model container [2020-09-25 00:02:57,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:02:57" (1/1) ... [2020-09-25 00:02:57,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:02:57,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:02:58,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:58,237 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:02:58,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:02:58,276 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:02:58,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58 WrapperNode [2020-09-25 00:02:58,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:02:58,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:02:58,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:02:58,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:02:58,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (1/1) ... [2020-09-25 00:02:58,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:02:58,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:02:58,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:02:58,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:02:58,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (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 00:02:58,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:02:58,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:02:58,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:02:58,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:02:58,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:02:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:02:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:02:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:02:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:02:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:02:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 00:02:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:02:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:02:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 00:02:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:02:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:02:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:02:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:02:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:02:58,835 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:02:58,835 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:02:58,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:58 BoogieIcfgContainer [2020-09-25 00:02:58,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:02:58,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:02:58,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:02:58,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:02:58,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:02:57" (1/3) ... [2020-09-25 00:02:58,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f00a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:58, skipping insertion in model container [2020-09-25 00:02:58,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:02:58" (2/3) ... [2020-09-25 00:02:58,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f00a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:02:58, skipping insertion in model container [2020-09-25 00:02:58,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:02:58" (3/3) ... [2020-09-25 00:02:58,852 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-09-25 00:02:58,865 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:02:58,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:02:58,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:02:58,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:02:58,928 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:02:58,928 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:02:58,928 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:02:58,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:02:58,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:02:58,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:02:58,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:02:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-25 00:02:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 00:02:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:02:58,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:02:58,961 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:02:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:02:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-25 00:02:58,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:02:58,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336981436] [2020-09-25 00:02:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:02:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 00:02:59,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:02:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-09-25 00:02:59,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:02:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:02:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:02:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:02:59,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:02:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:02:59,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:02:59,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:02:59,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:59,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:02:59,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:02:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:02:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:02:59,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:02:59,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:02:59,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:02:59,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:02:59,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:02:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:02:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:02:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:02:59,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:02:59,778 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 00:02:59,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336981436] [2020-09-25 00:02:59,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:02:59,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:02:59,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948309735] [2020-09-25 00:02:59,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:02:59,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:02:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:02:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:02:59,814 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 5 states. [2020-09-25 00:03:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:00,101 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2020-09-25 00:03:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:03:00,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-25 00:03:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:00,116 INFO L225 Difference]: With dead ends: 107 [2020-09-25 00:03:00,116 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 00:03:00,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:03:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 00:03:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-25 00:03:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 00:03:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 00:03:00,180 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2020-09-25 00:03:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:00,181 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 00:03:00,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:03:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 00:03:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 00:03:00,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:00,186 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] [2020-09-25 00:03:00,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:03:00,187 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-25 00:03:00,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:00,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972618840] [2020-09-25 00:03:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 00:03:02,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:03:02,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2428 [2020-09-25 00:03:02,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:03:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 00:03:02,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:02,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:02,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:02,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:02,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:03:02,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:02,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:02,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:02,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:02,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:03:02,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972618840] [2020-09-25 00:03:02,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:03:02,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 00:03:02,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520267192] [2020-09-25 00:03:02,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:03:02,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:03:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:03:02,789 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2020-09-25 00:03:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:03,062 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-09-25 00:03:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:03:03,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-25 00:03:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:03,065 INFO L225 Difference]: With dead ends: 64 [2020-09-25 00:03:03,065 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 00:03:03,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:03:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 00:03:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-25 00:03:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:03:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-25 00:03:03,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-09-25 00:03:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:03,077 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-25 00:03:03,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:03:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-25 00:03:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:03:03,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:03,080 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] [2020-09-25 00:03:03,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:03:03,080 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1495951507, now seen corresponding path program 1 times [2020-09-25 00:03:03,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:03,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383525630] [2020-09-25 00:03:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 00:03:04,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:03:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-09-25 00:03:04,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:03:04,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 00:03:04,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:04,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:04,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:04,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:04,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:04,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:04,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:04,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:04,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:04,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 00:03:04,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:04,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:04,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:04,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:04,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:04,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383525630] [2020-09-25 00:03:04,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:04,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:03:04,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917516021] [2020-09-25 00:03:04,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:03:04,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:04,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:03:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:03:04,308 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 12 states. [2020-09-25 00:03:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:04,888 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2020-09-25 00:03:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:03:04,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-09-25 00:03:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:04,890 INFO L225 Difference]: With dead ends: 114 [2020-09-25 00:03:04,890 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 00:03:04,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:03:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 00:03:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-09-25 00:03:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 00:03:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-25 00:03:04,901 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 46 [2020-09-25 00:03:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:04,901 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-25 00:03:04,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:03:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-25 00:03:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 00:03:04,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:04,904 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-25 00:03:04,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:03:04,904 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 1 times [2020-09-25 00:03:04,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:04,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473940656] [2020-09-25 00:03:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:08,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:03:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:03:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3519 [2020-09-25 00:03:08,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:03:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 00:03:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:03:08,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:08,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:08,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:08,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:08,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:03:08,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:08,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:08,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:08,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:08,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:03:08,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:08,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 00:03:08,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473940656] [2020-09-25 00:03:08,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:08,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:03:08,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741616225] [2020-09-25 00:03:08,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:03:08,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:03:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:03:08,568 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2020-09-25 00:03:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:08,729 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-09-25 00:03:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:03:08,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-09-25 00:03:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:08,731 INFO L225 Difference]: With dead ends: 94 [2020-09-25 00:03:08,731 INFO L226 Difference]: Without dead ends: 63 [2020-09-25 00:03:08,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:03:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-25 00:03:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-25 00:03:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 00:03:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-25 00:03:08,744 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-09-25 00:03:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:08,746 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-25 00:03:08,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:03:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-25 00:03:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 00:03:08,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:08,752 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 00:03:08,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:03:08,752 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-25 00:03:08,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:08,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264895438] [2020-09-25 00:03:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:08,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:09,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:10,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:13,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:03:13,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:03:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:03:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:14,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:14,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:14,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:03:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:14,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:14,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:14,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:14,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:14,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:14,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:14,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:14,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:14,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:14,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:14,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264895438] [2020-09-25 00:03:14,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:14,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 00:03:14,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137620275] [2020-09-25 00:03:14,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 00:03:14,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 00:03:14,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:03:14,280 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 18 states. [2020-09-25 00:03:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:15,479 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-09-25 00:03:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 00:03:15,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-09-25 00:03:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:15,482 INFO L225 Difference]: With dead ends: 108 [2020-09-25 00:03:15,482 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 00:03:15,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 00:03:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 00:03:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-09-25 00:03:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 00:03:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-09-25 00:03:15,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 58 [2020-09-25 00:03:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:15,496 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-09-25 00:03:15,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 00:03:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-09-25 00:03:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 00:03:15,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:15,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:03:15,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:03:15,498 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2138852750, now seen corresponding path program 2 times [2020-09-25 00:03:15,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:15,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379197948] [2020-09-25 00:03:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:16,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:17,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:20,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:20,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 00:03:20,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:03:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 00:03:20,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 00:03:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 00:03:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:03:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:20,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:20,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:20,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:20,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:20,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:03:20,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:20,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:20,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:20,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:20,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:20,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:03:20,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:20,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:20,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379197948] [2020-09-25 00:03:20,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:20,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:03:20,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711241404] [2020-09-25 00:03:20,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:03:20,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:20,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:03:20,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:03:20,817 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 16 states. [2020-09-25 00:03:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:22,191 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-09-25 00:03:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 00:03:22,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-09-25 00:03:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:22,194 INFO L225 Difference]: With dead ends: 133 [2020-09-25 00:03:22,194 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 00:03:22,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 00:03:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 00:03:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-09-25 00:03:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-25 00:03:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2020-09-25 00:03:22,234 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 64 [2020-09-25 00:03:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:22,235 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2020-09-25 00:03:22,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:03:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2020-09-25 00:03:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 00:03:22,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:22,241 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-09-25 00:03:22,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:03:22,241 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1245154100, now seen corresponding path program 3 times [2020-09-25 00:03:22,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:22,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646017376] [2020-09-25 00:03:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:22,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:22,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:23,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:24,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:27,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:27,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 00:03:27,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:03:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:03:27,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 00:03:27,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:27,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 00:03:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:27,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:27,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:27,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:27,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:03:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:27,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:27,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:27,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:27,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:03:27,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 00:03:27,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646017376] [2020-09-25 00:03:27,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:27,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:03:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209710656] [2020-09-25 00:03:27,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:03:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:03:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:03:27,567 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand 17 states. [2020-09-25 00:03:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:28,561 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2020-09-25 00:03:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-25 00:03:28,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-09-25 00:03:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:28,564 INFO L225 Difference]: With dead ends: 158 [2020-09-25 00:03:28,564 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 00:03:28,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 00:03:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 00:03:28,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2020-09-25 00:03:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-25 00:03:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2020-09-25 00:03:28,577 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 68 [2020-09-25 00:03:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:28,578 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2020-09-25 00:03:28,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:03:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2020-09-25 00:03:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 00:03:28,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:28,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-09-25 00:03:28,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:03:28,580 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1864607259, now seen corresponding path program 4 times [2020-09-25 00:03:28,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:28,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169153807] [2020-09-25 00:03:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:28,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:29,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:30,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:30,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:31,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:33,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 00:03:33,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:03:33,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 00:03:33,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:03:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 00:03:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:34,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:34,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:34,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:34,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:34,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:03:34,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:34,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:34,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:34,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:34,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:34,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:34,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:34,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:34,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:34,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-25 00:03:34,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169153807] [2020-09-25 00:03:34,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:34,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:03:34,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243608132] [2020-09-25 00:03:34,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:03:34,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:03:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:03:34,111 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand 20 states. [2020-09-25 00:03:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:35,523 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2020-09-25 00:03:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 00:03:35,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-09-25 00:03:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:35,525 INFO L225 Difference]: With dead ends: 189 [2020-09-25 00:03:35,525 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 00:03:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 00:03:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 00:03:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 154. [2020-09-25 00:03:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-25 00:03:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2020-09-25 00:03:35,539 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 70 [2020-09-25 00:03:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:35,539 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2020-09-25 00:03:35,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:03:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2020-09-25 00:03:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-25 00:03:35,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:35,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 00:03:35,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:03:35,541 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 685477565, now seen corresponding path program 5 times [2020-09-25 00:03:35,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:35,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582198045] [2020-09-25 00:03:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:03:35,566 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:03:35,567 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:03:35,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:03:35,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:03:35 BoogieIcfgContainer [2020-09-25 00:03:35,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:03:35,599 INFO L168 Benchmark]: Toolchain (without parser) took 37655.62 ms. Allocated memory was 145.8 MB in the beginning and 435.2 MB in the end (delta: 289.4 MB). Free memory was 102.4 MB in the beginning and 237.8 MB in the end (delta: -135.4 MB). Peak memory consumption was 154.1 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,600 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.69 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,602 INFO L168 Benchmark]: Boogie Preprocessor took 122.74 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,603 INFO L168 Benchmark]: RCFGBuilder took 441.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.6 MB in the beginning and 160.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,603 INFO L168 Benchmark]: TraceAbstraction took 36751.29 ms. Allocated memory was 201.9 MB in the beginning and 435.2 MB in the end (delta: 233.3 MB). Free memory was 160.0 MB in the beginning and 237.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 155.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:35,608 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.69 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.74 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.6 MB in the beginning and 160.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36751.29 ms. Allocated memory was 201.9 MB in the beginning and 435.2 MB in the end (delta: 233.3 MB). Free memory was 160.0 MB in the beginning and 237.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 155.6 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); [L29] i=0 [L29] COND TRUE i