/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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:34:47,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:34:47,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:34:47,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:34:47,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:34:47,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:34:47,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:34:47,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:34:47,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:34:47,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:34:47,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:34:47,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:34:47,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:34:47,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:34:47,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:34:47,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:34:47,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:34:47,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:34:47,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:34:47,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:34:47,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:34:47,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:34:47,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:34:47,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:34:47,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:34:47,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:34:47,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:34:47,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:34:47,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:34:47,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:34:47,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:34:48,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:34:48,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:34:48,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:34:48,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:34:48,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:34:48,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:34:48,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:34:48,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:34:48,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:34:48,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:34:48,011 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 04:34:48,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:34:48,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:34:48,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:34:48,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:34:48,071 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:34:48,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:34:48,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:34:48,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:34:48,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:34:48,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:34:48,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:34:48,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:34:48,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:34:48,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:34:48,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:34:48,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:34:48,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:34:48,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:34:48,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:34:48,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:34:48,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:34:48,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:34:48,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:34:48,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:34:48,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:34:48,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:34:48,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:34:48,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:34:48,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:34:48,078 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=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:34:48,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:34:48,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:34:48,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:34:48,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:34:48,562 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:34:48,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 04:34:48,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/703008c90/12e7536f01044cf3b64dc6bbcb5e6350/FLAGb1c17c229 [2020-09-25 04:34:49,213 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:34:49,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 04:34:49,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/703008c90/12e7536f01044cf3b64dc6bbcb5e6350/FLAGb1c17c229 [2020-09-25 04:34:49,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/703008c90/12e7536f01044cf3b64dc6bbcb5e6350 [2020-09-25 04:34:49,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:34:49,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:34:49,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:49,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:34:49,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:34:49,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a18185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49, skipping insertion in model container [2020-09-25 04:34:49,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:34:49,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:34:49,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:49,851 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:34:49,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:49,901 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:34:49,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49 WrapperNode [2020-09-25 04:34:49,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:49,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:34:49,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:34:49,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:34:49,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:49,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (1/1) ... [2020-09-25 04:34:50,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:34:50,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:34:50,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:34:50,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:34:50,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (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 04:34:50,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:34:50,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:34:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:34:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:34:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:34:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:34:50,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 04:34:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:34:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:34:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:34:50,352 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:34:50,353 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:34:50,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:50 BoogieIcfgContainer [2020-09-25 04:34:50,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:34:50,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:34:50,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:34:50,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:34:50,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:34:49" (1/3) ... [2020-09-25 04:34:50,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fbba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:50, skipping insertion in model container [2020-09-25 04:34:50,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:49" (2/3) ... [2020-09-25 04:34:50,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fbba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:50, skipping insertion in model container [2020-09-25 04:34:50,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:50" (3/3) ... [2020-09-25 04:34:50,391 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-25 04:34:50,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:34:50,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:34:50,467 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:34:50,501 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:34:50,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:34:50,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:34:50,502 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:34:50,502 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:34:50,502 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:34:50,502 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:34:50,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:34:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 04:34:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 04:34:50,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:50,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:50,531 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-25 04:34:50,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:50,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422007499] [2020-09-25 04:34:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:50,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:50,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 04:34:50,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:50,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-25 04:34:50,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:50,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:34:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 04:34:50,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:50,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:50,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:50,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:34:50,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:50,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:50,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:50,943 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 04:34:50,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422007499] [2020-09-25 04:34:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 04:34:50,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651554806] [2020-09-25 04:34:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 04:34:50,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:50,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 04:34:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:34:50,980 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-25 04:34:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:51,006 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-25 04:34:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 04:34:51,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 04:34:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:51,017 INFO L225 Difference]: With dead ends: 38 [2020-09-25 04:34:51,017 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 04:34:51,021 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 04:34:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 04:34:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 04:34:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 04:34:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-25 04:34:51,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-25 04:34:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:51,068 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-25 04:34:51,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 04:34:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-25 04:34:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 04:34:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:51,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:51,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:34:51,070 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:51,071 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-25 04:34:51,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:51,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152154523] [2020-09-25 04:34:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:51,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:51,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 04:34:51,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:51,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 04:34:51,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:51,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:51,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:34:51,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 04:34:51,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 04:34:51,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:51,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:51,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:51,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:51,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:34:51,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:51,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:51,279 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 04:34:51,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152154523] [2020-09-25 04:34:51,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:51,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:34:51,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208579963] [2020-09-25 04:34:51,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:34:51,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:34:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:34:51,284 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-25 04:34:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:51,331 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-25 04:34:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:34:51,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 04:34:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:51,334 INFO L225 Difference]: With dead ends: 28 [2020-09-25 04:34:51,334 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 04:34:51,335 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 04:34:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 04:34:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 04:34:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 04:34:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 04:34:51,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-25 04:34:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:51,342 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 04:34:51,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:34:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 04:34:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 04:34:51,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:51,344 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 04:34:51,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:34:51,345 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-25 04:34:51,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:51,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778782303] [2020-09-25 04:34:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:51,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:51,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 04:34:51,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-09-25 04:34:51,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:51,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 04:34:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 04:34:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:34:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:51,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:51,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:51,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:51,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:34:51,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:51,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:51,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:51,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:51,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:51,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:51,928 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 04:34:51,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778782303] [2020-09-25 04:34:51,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:51,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 04:34:51,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839420483] [2020-09-25 04:34:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 04:34:51,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 04:34:51,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:34:51,933 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-25 04:34:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:52,208 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-25 04:34:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:34:52,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 04:34:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:52,210 INFO L225 Difference]: With dead ends: 34 [2020-09-25 04:34:52,210 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 04:34:52,211 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 04:34:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 04:34:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-25 04:34:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 04:34:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 04:34:52,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-25 04:34:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:52,218 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 04:34:52,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 04:34:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 04:34:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 04:34:52,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:52,220 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 04:34:52,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:34:52,220 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-25 04:34:52,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:52,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257613828] [2020-09-25 04:34:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:52,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 04:34:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 04:34:52,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:52,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:34:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 04:34:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 04:34:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:52,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:52,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:52,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:52,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:52,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:52,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:52,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:52,297 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 04:34:52,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257613828] [2020-09-25 04:34:52,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:52,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 04:34:52,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676534288] [2020-09-25 04:34:52,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 04:34:52,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:52,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 04:34:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:34:52,300 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-25 04:34:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:52,322 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-25 04:34:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 04:34:52,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-25 04:34:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:52,324 INFO L225 Difference]: With dead ends: 40 [2020-09-25 04:34:52,325 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 04:34:52,325 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 04:34:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 04:34:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 04:34:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 04:34:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 04:34:52,331 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-25 04:34:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:52,331 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 04:34:52,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 04:34:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 04:34:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 04:34:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:52,333 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 04:34:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:34:52,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-25 04:34:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:52,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105941629] [2020-09-25 04:34:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:52,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:52,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 04:34:52,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-25 04:34:52,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:52,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 04:34:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 04:34:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 04:34:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:52,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:52,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:52,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:52,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:52,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:52,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:52,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:52,904 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 04:34:52,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105941629] [2020-09-25 04:34:52,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:52,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 04:34:52,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618977781] [2020-09-25 04:34:52,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 04:34:52,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:52,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 04:34:52,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:34:52,908 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 04:34:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:53,350 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-25 04:34:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 04:34:53,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 04:34:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:53,352 INFO L225 Difference]: With dead ends: 41 [2020-09-25 04:34:53,352 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 04:34:53,353 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 04:34:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 04:34:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-25 04:34:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 04:34:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-25 04:34:53,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-25 04:34:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:53,360 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-25 04:34:53,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 04:34:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-25 04:34:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 04:34:53,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:53,361 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 04:34:53,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:34:53,362 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-25 04:34:53,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:53,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008198507] [2020-09-25 04:34:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:53,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:53,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:53,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 04:34:53,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:53,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-25 04:34:53,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:53,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:34:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 04:34:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 04:34:53,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:53,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:53,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:53,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:53,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:53,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:53,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:53,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:53,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:53,483 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 04:34:53,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008198507] [2020-09-25 04:34:53,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:53,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:34:53,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582770227] [2020-09-25 04:34:53,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:34:53,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:34:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:34:53,486 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-25 04:34:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:53,533 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 04:34:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:34:53,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 04:34:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:53,535 INFO L225 Difference]: With dead ends: 46 [2020-09-25 04:34:53,535 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 04:34:53,536 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 04:34:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 04:34:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-25 04:34:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 04:34:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 04:34:53,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-25 04:34:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:53,542 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 04:34:53,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:34:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 04:34:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 04:34:53,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:53,543 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 04:34:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:34:53,544 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-25 04:34:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:53,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731885233] [2020-09-25 04:34:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:53,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:53,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 04:34:53,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:53,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-09-25 04:34:53,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:53,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 04:34:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 04:34:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 04:34:53,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:54,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:54,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:54,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:54,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:54,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:34:54,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:54,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:54,120 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 04:34:54,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731885233] [2020-09-25 04:34:54,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:54,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 04:34:54,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429754484] [2020-09-25 04:34:54,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 04:34:54,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 04:34:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:34:54,123 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 04:34:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:54,447 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 04:34:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 04:34:54,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 04:34:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:54,449 INFO L225 Difference]: With dead ends: 46 [2020-09-25 04:34:54,449 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 04:34:54,449 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 04:34:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 04:34:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-25 04:34:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 04:34:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 04:34:54,455 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-25 04:34:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:54,455 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 04:34:54,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 04:34:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 04:34:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 04:34:54,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:54,457 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 04:34:54,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 04:34:54,457 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:54,458 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-25 04:34:54,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:54,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157998418] [2020-09-25 04:34:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:54,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:54,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 04:34:54,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:54,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-25 04:34:54,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:54,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:34:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 04:34:54,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 04:34:54,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:54,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:54,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:54,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:34:54,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:54,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:34:54,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:54,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:54,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:54,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:54,643 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 04:34:54,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157998418] [2020-09-25 04:34:54,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:54,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:34:54,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082653738] [2020-09-25 04:34:54,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:34:54,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:54,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:34:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:34:54,646 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-25 04:34:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:54,722 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-25 04:34:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 04:34:54,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 04:34:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:54,724 INFO L225 Difference]: With dead ends: 56 [2020-09-25 04:34:54,724 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 04:34:54,725 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 04:34:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 04:34:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 04:34:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 04:34:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 04:34:54,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-25 04:34:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:54,731 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 04:34:54,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:34:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 04:34:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 04:34:54,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:54,732 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 04:34:54,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 04:34:54,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-25 04:34:54,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:54,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947246418] [2020-09-25 04:34:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:34:54,746 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:34:54,746 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:34:54,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 04:34:54,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:34:54 BoogieIcfgContainer [2020-09-25 04:34:54,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:34:54,776 INFO L168 Benchmark]: Toolchain (without parser) took 5195.05 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 102.7 MB in the beginning and 160.9 MB in the end (delta: -58.2 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:54,777 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 04:34:54,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.10 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:54,779 INFO L168 Benchmark]: Boogie Preprocessor took 119.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:54,780 INFO L168 Benchmark]: RCFGBuilder took 336.55 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:54,781 INFO L168 Benchmark]: TraceAbstraction took 4394.91 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 168.6 MB in the beginning and 160.9 MB in the end (delta: 7.7 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:34:54,784 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 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.10 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.55 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4394.91 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 168.6 MB in the beginning and 160.9 MB in the end (delta: 7.7 MB). Peak memory consumption was 52.8 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: 4.2s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 1.3s, 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, 0.3s 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...