/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=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:44:55,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:44:55,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:44:55,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:44:55,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:44:55,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:44:55,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:44:55,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:44:55,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:44:55,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:44:55,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:44:55,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:44:55,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:44:55,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:44:55,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:44:55,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:44:55,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:44:55,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:44:55,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:44:55,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:44:55,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:44:55,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:44:55,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:44:55,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:44:55,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:44:55,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:44:55,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:44:55,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:44:55,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:44:55,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:44:55,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:44:55,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:44:55,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:44:55,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:44:55,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:44:55,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:44:55,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:44:55,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:44:55,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:44:55,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:44:55,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:44:55,113 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 05:44:55,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:44:55,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:44:55,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:44:55,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:44:55,171 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:44:55,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:44:55,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:44:55,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:44:55,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:44:55,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:44:55,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:44:55,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:44:55,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:44:55,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:44:55,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:44:55,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:44:55,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:44:55,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:44:55,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:44:55,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:44:55,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:44:55,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:44:55,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:44:55,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:44:55,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:44:55,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:44:55,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:44:55,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:44:55,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:44:55,177 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 05:44:55,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:44:55,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:44:55,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:44:55,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:44:55,662 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:44:55,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-09-25 05:44:55,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31e47aa/e2ab0af7de3e45ef9033309a17e69ad0/FLAG0d0bacf0a [2020-09-25 05:44:56,250 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:44:56,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-09-25 05:44:56,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31e47aa/e2ab0af7de3e45ef9033309a17e69ad0/FLAG0d0bacf0a [2020-09-25 05:44:56,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31e47aa/e2ab0af7de3e45ef9033309a17e69ad0 [2020-09-25 05:44:56,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:44:56,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:44:56,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:44:56,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:44:56,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:44:56,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:56,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba61646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56, skipping insertion in model container [2020-09-25 05:44:56,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:56,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:44:56,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:44:56,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:44:56,906 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:44:56,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:44:56,941 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:44:56,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56 WrapperNode [2020-09-25 05:44:56,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:44:56,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:44:56,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:44:56,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:44:56,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:56,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:56,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:56,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:57,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:57,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:57,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (1/1) ... [2020-09-25 05:44:57,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:44:57,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:44:57,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:44:57,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:44:57,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (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 05:44:57,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:44:57,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:44:57,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:44:57,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:44:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:44:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:44:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:44:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:44:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:44:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:44:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:44:57,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:44:57,396 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:44:57,397 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:44:57,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:44:57 BoogieIcfgContainer [2020-09-25 05:44:57,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:44:57,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:44:57,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:44:57,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:44:57,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:44:56" (1/3) ... [2020-09-25 05:44:57,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3facba72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:44:57, skipping insertion in model container [2020-09-25 05:44:57,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:44:56" (2/3) ... [2020-09-25 05:44:57,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3facba72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:44:57, skipping insertion in model container [2020-09-25 05:44:57,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:44:57" (3/3) ... [2020-09-25 05:44:57,415 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-09-25 05:44:57,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:44:57,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:44:57,472 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:44:57,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:44:57,508 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:44:57,508 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:44:57,508 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:44:57,508 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:44:57,509 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:44:57,509 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:44:57,510 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:44:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-25 05:44:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 05:44:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:57,548 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 05:44:57,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash 341466613, now seen corresponding path program 1 times [2020-09-25 05:44:57,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:57,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619247000] [2020-09-25 05:44:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:57,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:57,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 05:44:57,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 05:44:57,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:57,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:57,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:44:57,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:44:57,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:44:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 05:44:57,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:57,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:57,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:57,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:44:57,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:44:57,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:57,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:57,898 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 05:44:57,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619247000] [2020-09-25 05:44:57,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:44:57,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:44:57,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836753628] [2020-09-25 05:44:57,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:44:57,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:44:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:44:57,927 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-09-25 05:44:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:58,078 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-25 05:44:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:44:58,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-25 05:44:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:58,093 INFO L225 Difference]: With dead ends: 51 [2020-09-25 05:44:58,094 INFO L226 Difference]: Without dead ends: 27 [2020-09-25 05:44:58,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:44:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-25 05:44:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-25 05:44:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 05:44:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-25 05:44:58,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2020-09-25 05:44:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:58,146 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-25 05:44:58,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:44:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-25 05:44:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 05:44:58,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:58,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:58,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:44:58,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash 178703795, now seen corresponding path program 1 times [2020-09-25 05:44:58,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:58,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576150110] [2020-09-25 05:44:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:58,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:58,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:58,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 05:44:58,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:44:58,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-09-25 05:44:58,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:58,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:58,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:44:58,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:44:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:44:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:44:58,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:58,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:58,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:58,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:44:58,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 05:44:58,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:58,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:58,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:44:58,658 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 05:44:58,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576150110] [2020-09-25 05:44:58,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:58,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:44:58,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646418088] [2020-09-25 05:44:58,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:44:58,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:44:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:44:58,672 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-25 05:44:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:58,982 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-25 05:44:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:44:58,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-25 05:44:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:58,984 INFO L225 Difference]: With dead ends: 38 [2020-09-25 05:44:58,984 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 05:44:58,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:44:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 05:44:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-25 05:44:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 05:44:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-09-25 05:44:58,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-09-25 05:44:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:58,994 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-09-25 05:44:58,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:44:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-09-25 05:44:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 05:44:58,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:58,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:58,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:44:58,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash 563687025, now seen corresponding path program 2 times [2020-09-25 05:44:58,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:58,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229318780] [2020-09-25 05:44:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:59,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 05:44:59,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:44:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-09-25 05:44:59,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:59,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:44:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:44:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 05:44:59,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:59,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:44:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:44:59,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:44:59,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:44:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:44:59,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:44:59,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:44:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:44:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:44:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:44:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:44:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:44:59,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229318780] [2020-09-25 05:44:59,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:44:59,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:44:59,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581494232] [2020-09-25 05:44:59,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:44:59,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:44:59,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:44:59,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:44:59,595 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-09-25 05:44:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:44:59,895 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-25 05:44:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 05:44:59,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-25 05:44:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:44:59,897 INFO L225 Difference]: With dead ends: 42 [2020-09-25 05:44:59,897 INFO L226 Difference]: Without dead ends: 35 [2020-09-25 05:44:59,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-09-25 05:44:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-25 05:44:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-25 05:44:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 05:44:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-25 05:44:59,910 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2020-09-25 05:44:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:44:59,911 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-25 05:44:59,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:44:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-25 05:44:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:44:59,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:44:59,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:44:59,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:44:59,915 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:44:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:44:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1026490321, now seen corresponding path program 3 times [2020-09-25 05:44:59,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:44:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036202995] [2020-09-25 05:44:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:44:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:44:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:44:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:00,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:45:00,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:45:00,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 05:45:00,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-09-25 05:45:00,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:45:00,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:45:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:45:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 05:45:00,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 05:45:00,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:45:01,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:45:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:45:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:45:01,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:45:01,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:45:01,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:45:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:45:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:45:01,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:45:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:45:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:45:01,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:45:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 05:45:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:45:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036202995] [2020-09-25 05:45:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:45:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:45:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705605148] [2020-09-25 05:45:01,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:45:01,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:45:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:45:01,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:45:01,033 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 11 states. [2020-09-25 05:45:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:45:01,381 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-25 05:45:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:45:01,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-09-25 05:45:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:45:01,382 INFO L225 Difference]: With dead ends: 34 [2020-09-25 05:45:01,382 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 05:45:01,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-09-25 05:45:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 05:45:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 05:45:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 05:45:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 05:45:01,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-09-25 05:45:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:45:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 05:45:01,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:45:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 05:45:01,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 05:45:01,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:45:01,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 05:45:01,487 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,488 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-25 05:45:01,488 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_65~0 |old(~__return_65~0)|)) [2020-09-25 05:45:01,488 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,488 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,489 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 05:45:01,489 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 05:45:01,489 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 05:45:01,489 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-25 05:45:01,489 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 05:45:01,489 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-09-25 05:45:01,490 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-25 05:45:01,491 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-25 05:45:01,492 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-09-25 05:45:01,493 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-09-25 05:45:01,493 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-25 05:45:01,493 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,493 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,493 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-25 05:45:01,493 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 05:45:01,494 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 05:45:01,494 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-25 05:45:01,494 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-25 05:45:01,494 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 4) (* 2 main_~main__y~0)) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2020-09-25 05:45:01,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:45:01 BoogieIcfgContainer [2020-09-25 05:45:01,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:45:01,522 INFO L168 Benchmark]: Toolchain (without parser) took 4923.53 ms. Allocated memory was 146.8 MB in the beginning and 244.8 MB in the end (delta: 98.0 MB). Free memory was 103.7 MB in the beginning and 114.0 MB in the end (delta: -10.4 MB). Peak memory consumption was 87.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,523 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:45:01,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.19 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,525 INFO L168 Benchmark]: Boogie Preprocessor took 126.28 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 183.0 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,526 INFO L168 Benchmark]: RCFGBuilder took 334.22 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 168.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,527 INFO L168 Benchmark]: TraceAbstraction took 4114.00 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 168.0 MB in the beginning and 114.0 MB in the end (delta: 54.0 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:45:01,531 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.19 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.28 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 183.0 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.22 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 168.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4114.00 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 168.0 MB in the beginning and 114.0 MB in the end (delta: 54.0 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (\old(__return_65) == __return_65 && main__x + 50 <= 0) || ((main__x + 4 <= 2 * main__y && \old(__return_65) == __return_65) && main__x + 2 <= main__y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 163 SDslu, 127 SDs, 0 SdLazy, 425 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 8 NumberOfFragments, 38 HoareAnnotationTreeSize, 5 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 32 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 8808 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 11/22 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 correct! Received shutdown request...