/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:01:18,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:01:18,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:01:18,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:01:18,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:01:18,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:01:18,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:01:18,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:01:18,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:01:18,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:01:18,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:01:18,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:01:18,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:01:18,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:01:18,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:01:18,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:01:18,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:01:18,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:01:18,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:01:18,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:01:18,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:01:18,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:01:18,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:01:18,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:01:18,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:01:18,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:01:18,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:01:18,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:01:18,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:01:18,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:01:18,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:01:18,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:01:18,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:01:18,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:01:18,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:01:18,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:01:18,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:01:18,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:01:18,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:01:18,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:01:18,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:01:18,998 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 08:01:19,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:01:19,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:01:19,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:01:19,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:01:19,027 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:01:19,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:01:19,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:01:19,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:01:19,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:01:19,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:01:19,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:01:19,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:01:19,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:01:19,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:01:19,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:01:19,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:01:19,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:01:19,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:01:19,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:01:19,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:01:19,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:01:19,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:19,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:01:19,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:01:19,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:01:19,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:01:19,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:01:19,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:01:19,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:01:19,033 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:01:19,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:01:19,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:01:19,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:01:19,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:01:19,585 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:01:19,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 08:01:19,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09c9416c0/a5c89c482b82417b8d86ac4109901e26/FLAGb0a29dc64 [2020-09-25 08:01:20,211 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:01:20,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 08:01:20,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09c9416c0/a5c89c482b82417b8d86ac4109901e26/FLAGb0a29dc64 [2020-09-25 08:01:20,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09c9416c0/a5c89c482b82417b8d86ac4109901e26 [2020-09-25 08:01:20,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:01:20,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:01:20,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:20,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:01:20,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:01:20,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:20,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad63123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20, skipping insertion in model container [2020-09-25 08:01:20,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:20,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:01:20,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:01:20,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:20,861 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:01:20,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:20,903 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:01:20,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20 WrapperNode [2020-09-25 08:01:20,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:20,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:01:20,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:01:20,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:01:20,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:20,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:20,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:20,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:21,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:21,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:21,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (1/1) ... [2020-09-25 08:01:21,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:01:21,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:01:21,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:01:21,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:01:21,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (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 08:01:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:01:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:01:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:01:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:01:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:01:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:01:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 08:01:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:01:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:01:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:01:21,319 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:01:21,319 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 08:01:21,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:21 BoogieIcfgContainer [2020-09-25 08:01:21,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:01:21,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:01:21,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:01:21,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:01:21,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:01:20" (1/3) ... [2020-09-25 08:01:21,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399359d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:21, skipping insertion in model container [2020-09-25 08:01:21,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:20" (2/3) ... [2020-09-25 08:01:21,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399359d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:21, skipping insertion in model container [2020-09-25 08:01:21,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:21" (3/3) ... [2020-09-25 08:01:21,335 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-25 08:01:21,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:01:21,360 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:01:21,405 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:01:21,455 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:01:21,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:01:21,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:01:21,456 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:01:21,456 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:01:21,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:01:21,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:01:21,456 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:01:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 08:01:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 08:01:21,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:21,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:21,493 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-25 08:01:21,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:21,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374108028] [2020-09-25 08:01:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:21,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:21,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 08:01:21,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:21,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-09-25 08:01:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:21,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:01:21,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:21,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:21,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:21,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:21,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:21,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:21,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:01:21,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:21,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:21,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:21,903 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 08:01:21,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374108028] [2020-09-25 08:01:21,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:21,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 08:01:21,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317546479] [2020-09-25 08:01:21,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 08:01:21,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 08:01:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:01:21,937 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-25 08:01:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:21,966 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-25 08:01:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 08:01:21,968 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 08:01:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:21,977 INFO L225 Difference]: With dead ends: 38 [2020-09-25 08:01:21,978 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 08:01:21,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:01:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 08:01:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 08:01:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 08:01:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-25 08:01:22,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-25 08:01:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:22,027 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-25 08:01:22,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 08:01:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-25 08:01:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 08:01:22,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:22,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:22,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:01:22,029 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-25 08:01:22,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:22,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997445215] [2020-09-25 08:01:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 08:01:22,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:22,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 08:01:22,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:01:22,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:01:22,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:22,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:22,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:01:22,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:22,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:22,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:22,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:22,251 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 08:01:22,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997445215] [2020-09-25 08:01:22,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:22,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:01:22,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061624887] [2020-09-25 08:01:22,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:01:22,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:01:22,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:01:22,256 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-25 08:01:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:22,304 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-25 08:01:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:01:22,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 08:01:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:22,306 INFO L225 Difference]: With dead ends: 28 [2020-09-25 08:01:22,306 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 08:01:22,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 08:01:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 08:01:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 08:01:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 08:01:22,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-25 08:01:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:22,315 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 08:01:22,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:01:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 08:01:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 08:01:22,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:22,316 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] [2020-09-25 08:01:22,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:01:22,317 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:22,318 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-25 08:01:22,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:22,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377220648] [2020-09-25 08:01:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 08:01:22,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-09-25 08:01:22,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:01:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:01:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 08:01:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:22,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:22,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:22,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:22,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:22,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:22,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:22,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:22,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377220648] [2020-09-25 08:01:22,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:22,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:01:22,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821773358] [2020-09-25 08:01:22,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:01:22,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:01:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:01:22,783 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-25 08:01:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:23,081 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-25 08:01:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 08:01:23,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 08:01:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:23,083 INFO L225 Difference]: With dead ends: 34 [2020-09-25 08:01:23,083 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 08:01:23,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:01:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 08:01:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-25 08:01:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 08:01:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 08:01:23,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-25 08:01:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:23,092 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 08:01:23,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:01:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 08:01:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 08:01:23,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:23,093 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] [2020-09-25 08:01:23,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:01:23,094 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-25 08:01:23,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:23,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437497867] [2020-09-25 08:01:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:23,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:23,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:23,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 08:01:23,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:23,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 08:01:23,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:23,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:23,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 08:01:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 08:01:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:23,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:23,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:23,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:23,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:23,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:23,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:01:23,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:23,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:23,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:23,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:23,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 08:01:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:23,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437497867] [2020-09-25 08:01:23,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:23,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:01:23,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860423310] [2020-09-25 08:01:23,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:01:23,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:23,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:01:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:23,236 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-25 08:01:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:23,274 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-25 08:01:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:01:23,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-25 08:01:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:23,275 INFO L225 Difference]: With dead ends: 40 [2020-09-25 08:01:23,275 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 08:01:23,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 08:01:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 08:01:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 08:01:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 08:01:23,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-25 08:01:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:23,290 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 08:01:23,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:01:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 08:01:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 08:01:23,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:23,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:23,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:01:23,292 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-25 08:01:23,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:23,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924013149] [2020-09-25 08:01:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:23,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:23,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 08:01:23,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:23,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-09-25 08:01:23,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:23,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 08:01:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:01:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 08:01:23,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:23,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:23,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:23,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:23,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:23,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:23,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:23,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:23,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:23,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924013149] [2020-09-25 08:01:23,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:23,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 08:01:23,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367769953] [2020-09-25 08:01:23,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 08:01:23,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 08:01:23,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 08:01:23,937 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 08:01:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:24,432 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-25 08:01:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:01:24,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 08:01:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:24,434 INFO L225 Difference]: With dead ends: 41 [2020-09-25 08:01:24,434 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 08:01:24,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:01:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 08:01:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-25 08:01:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 08:01:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-25 08:01:24,442 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-25 08:01:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:24,442 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-25 08:01:24,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 08:01:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-25 08:01:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 08:01:24,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:24,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:24,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:01:24,444 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-25 08:01:24,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:24,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259609219] [2020-09-25 08:01:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:24,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 08:01:24,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:24,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 08:01:24,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:24,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 08:01:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 08:01:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:24,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:24,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:24,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:24,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:24,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:24,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:24,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259609219] [2020-09-25 08:01:24,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:24,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 08:01:24,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9597522] [2020-09-25 08:01:24,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:01:24,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:01:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:01:24,566 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-25 08:01:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:24,614 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 08:01:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:01:24,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 08:01:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:24,616 INFO L225 Difference]: With dead ends: 46 [2020-09-25 08:01:24,616 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 08:01:24,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:01:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 08:01:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-25 08:01:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 08:01:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 08:01:24,622 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-25 08:01:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:24,623 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 08:01:24,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:01:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 08:01:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 08:01:24,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:24,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:24,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:01:24,625 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-25 08:01:24,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:24,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469359743] [2020-09-25 08:01:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:24,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 08:01:24,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-09-25 08:01:24,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:24,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 08:01:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:01:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 08:01:24,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:25,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:25,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:25,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:25,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:25,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:25,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:25,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 08:01:25,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469359743] [2020-09-25 08:01:25,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:25,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:01:25,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998510659] [2020-09-25 08:01:25,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:01:25,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:25,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:01:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:01:25,186 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 08:01:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:25,518 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 08:01:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:01:25,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 08:01:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:25,519 INFO L225 Difference]: With dead ends: 46 [2020-09-25 08:01:25,520 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 08:01:25,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 08:01:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 08:01:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-25 08:01:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 08:01:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 08:01:25,526 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-25 08:01:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:25,526 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 08:01:25,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:01:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 08:01:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 08:01:25,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:25,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:25,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:01:25,528 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:25,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-25 08:01:25,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:25,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234966388] [2020-09-25 08:01:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:25,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 08:01:25,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:25,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 08:01:25,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:25,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:01:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 08:01:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 08:01:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:25,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:25,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:25,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:25,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:01:25,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:25,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:25,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:25,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234966388] [2020-09-25 08:01:25,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:25,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 08:01:25,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084555613] [2020-09-25 08:01:25,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:01:25,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:01:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:01:25,690 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-25 08:01:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:25,764 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-25 08:01:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 08:01:25,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 08:01:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:25,766 INFO L225 Difference]: With dead ends: 56 [2020-09-25 08:01:25,766 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 08:01:25,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:01:25,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 08:01:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 08:01:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 08:01:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 08:01:25,773 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-25 08:01:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:25,774 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 08:01:25,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:01:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 08:01:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 08:01:25,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:25,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:25,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:01:25,776 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-25 08:01:25,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:25,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941201986] [2020-09-25 08:01:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:01:25,789 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:01:25,789 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:01:25,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:01:25,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:01:25 BoogieIcfgContainer [2020-09-25 08:01:25,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:01:25,820 INFO L168 Benchmark]: Toolchain (without parser) took 5256.67 ms. Allocated memory was 145.8 MB in the beginning and 248.5 MB in the end (delta: 102.8 MB). Free memory was 102.2 MB in the beginning and 165.7 MB in the end (delta: -63.5 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,821 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 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.69 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,823 INFO L168 Benchmark]: Boogie Preprocessor took 126.85 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 181.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,824 INFO L168 Benchmark]: RCFGBuilder took 293.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 169.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,825 INFO L168 Benchmark]: TraceAbstraction took 4489.85 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 168.0 MB in the beginning and 165.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:25,829 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 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.69 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.85 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 181.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 169.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4489.85 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 168.0 MB in the beginning and 165.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 48 SDslu, 468 SDs, 0 SdLazy, 421 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 226 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 21754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 23/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...