/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:08:48,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:08:48,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:08:48,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:08:48,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:08:48,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:08:48,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:08:48,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:08:48,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:08:48,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:08:48,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:08:48,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:08:48,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:08:48,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:08:48,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:08:48,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:08:48,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:08:48,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:08:48,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:08:48,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:08:48,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:08:48,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:08:48,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:08:48,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:08:49,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:08:49,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:08:49,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:08:49,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:08:49,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:08:49,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:08:49,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:08:49,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:08:49,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:08:49,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:08:49,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:08:49,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:08:49,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:08:49,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:08:49,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:08:49,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:08:49,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:08:49,025 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 [2020-10-12 16:08:49,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:08:49,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:08:49,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:08:49,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:08:49,048 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:08:49,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:08:49,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:08:49,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:08:49,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:08:49,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:08:49,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:08:49,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:08:49,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:08:49,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:08:49,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:08:49,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:08:49,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:08:49,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:08:49,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:08:49,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:08:49,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:08:49,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:08:49,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:08:49,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:08:49,053 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:08:49,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:08:49,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:08:49,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:08:49,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:08:49,389 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:08:49,390 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-10-12 16:08:49,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c7a9a3ae/09f5fb6ceb3949a9810e58f05aae3ab4/FLAGcdaa1c73b [2020-10-12 16:08:49,914 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:08:49,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-10-12 16:08:49,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c7a9a3ae/09f5fb6ceb3949a9810e58f05aae3ab4/FLAGcdaa1c73b [2020-10-12 16:08:50,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c7a9a3ae/09f5fb6ceb3949a9810e58f05aae3ab4 [2020-10-12 16:08:50,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:08:50,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:08:50,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:08:50,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:08:50,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:08:50,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50, skipping insertion in model container [2020-10-12 16:08:50,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:08:50,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:08:50,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:08:50,557 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:08:50,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:08:50,587 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:08:50,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50 WrapperNode [2020-10-12 16:08:50,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:08:50,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:08:50,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:08:50,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:08:50,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (1/1) ... [2020-10-12 16:08:50,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:08:50,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:08:50,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:08:50,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:08:50,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (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 [2020-10-12 16:08:50,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:08:50,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:08:50,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:08:50,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:08:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:08:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:08:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:08:50,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:08:50,978 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 16:08:50,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:08:50 BoogieIcfgContainer [2020-10-12 16:08:50,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:08:50,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:08:50,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:08:50,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:08:50,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:08:50" (1/3) ... [2020-10-12 16:08:50,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca37dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:08:50, skipping insertion in model container [2020-10-12 16:08:50,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:08:50" (2/3) ... [2020-10-12 16:08:50,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca37dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:08:50, skipping insertion in model container [2020-10-12 16:08:50,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:08:50" (3/3) ... [2020-10-12 16:08:50,990 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-10-12 16:08:51,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:08:51,010 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:08:51,026 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:08:51,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:08:51,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:08:51,092 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:08:51,093 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:08:51,093 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:08:51,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:08:51,093 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:08:51,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:08:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-12 16:08:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:08:51,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:51,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:51,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-10-12 16:08:51,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:51,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030284392] [2020-10-12 16:08:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:51,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:51,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:08:51,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:51,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 16:08:51,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:08:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:08:51,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:08:51,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:08:51,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:51,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:51,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:51,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:08:51,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:08:51,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:51,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:51,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:08:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:51,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030284392] [2020-10-12 16:08:51,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:08:51,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:08:51,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717771705] [2020-10-12 16:08:51,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:08:51,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:08:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:08:51,731 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-10-12 16:08:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:52,071 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-12 16:08:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:08:52,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-12 16:08:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:52,085 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:08:52,085 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:08:52,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:08:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:08:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 16:08:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:08:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-12 16:08:52,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-12 16:08:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:52,130 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-12 16:08:52,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:08:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-12 16:08:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:08:52,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:52,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:52,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:08:52,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-10-12 16:08:52,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:52,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931084155] [2020-10-12 16:08:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:52,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:52,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:08:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-12 16:08:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:08:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:08:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:08:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:52,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:52,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:52,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:08:52,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:52,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:08:52,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:52,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931084155] [2020-10-12 16:08:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:52,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:08:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623580871] [2020-10-12 16:08:52,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:08:52,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:08:52,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:08:52,559 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-12 16:08:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:52,769 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-12 16:08:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:08:52,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-12 16:08:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:52,770 INFO L225 Difference]: With dead ends: 19 [2020-10-12 16:08:52,771 INFO L226 Difference]: Without dead ends: 15 [2020-10-12 16:08:52,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:08:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-12 16:08:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-12 16:08:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:08:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 16:08:52,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-12 16:08:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:52,778 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 16:08:52,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:08:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 16:08:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:08:52,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:52,779 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:52,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:08:52,779 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:52,780 INFO L82 PathProgramCache]: Analyzing trace with hash 507280141, now seen corresponding path program 2 times [2020-10-12 16:08:52,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:52,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128473778] [2020-10-12 16:08:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:52,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:52,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:08:52,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:52,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-12 16:08:52,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:08:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:08:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:08:52,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:53,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:53,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:53,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:53,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:08:53,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:53,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:08:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:53,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:08:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:53,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128473778] [2020-10-12 16:08:53,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:53,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:08:53,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218334806] [2020-10-12 16:08:53,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:08:53,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:08:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:08:53,094 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-12 16:08:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:53,326 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-12 16:08:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:08:53,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-12 16:08:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:53,327 INFO L225 Difference]: With dead ends: 20 [2020-10-12 16:08:53,328 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:08:53,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:08:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:08:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:08:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:08:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-12 16:08:53,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-12 16:08:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:53,336 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-12 16:08:53,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:08:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-12 16:08:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:08:53,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:53,337 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:53,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:08:53,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1456124108, now seen corresponding path program 3 times [2020-10-12 16:08:53,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:53,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475891073] [2020-10-12 16:08:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:53,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:53,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:53,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:08:53,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:53,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 16:08:53,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:08:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:08:53,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:08:53,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:08:53,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:53,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:53,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:08:53,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:53,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:08:53,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:08:53,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475891073] [2020-10-12 16:08:53,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:53,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:08:53,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482058779] [2020-10-12 16:08:53,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:08:53,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:08:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:08:53,584 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-12 16:08:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:53,699 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-12 16:08:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:08:53,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-12 16:08:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:53,700 INFO L225 Difference]: With dead ends: 16 [2020-10-12 16:08:53,700 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:08:53,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:08:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:08:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:08:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:08:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:08:53,702 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-12 16:08:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:53,703 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:08:53,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:08:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:08:53,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:08:53,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:08:53,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:08:53,784 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:08:53,785 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_72~0 |old(~__return_72~0)|)) [2020-10-12 16:08:53,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:08:53,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:08:53,785 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 16:08:53,785 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:08:53,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 51) no Hoare annotation was computed. [2020-10-12 16:08:53,786 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 68) the Hoare annotation is: (= |old(~__return_72~0)| ~__return_72~0) [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 68) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point L23(lines 23 66) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point L17(lines 17 67) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point L49(lines 49 58) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 68) no Hoare annotation was computed. [2020-10-12 16:08:53,787 INFO L268 CegarLoopResult]: For program point L42(lines 42 64) no Hoare annotation was computed. [2020-10-12 16:08:53,788 INFO L264 CegarLoopResult]: At program point L38(lines 28 66) the Hoare annotation is: (and (= |old(~__return_72~0)| ~__return_72~0) (or (not (= main_~main__j~0 main_~main__i~0)) (and (<= main_~main__x~0 main_~main__y~0) (<= main_~main__y~0 main_~main__x~0)))) [2020-10-12 16:08:53,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:08:53 BoogieIcfgContainer [2020-10-12 16:08:53,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:08:53,823 INFO L168 Benchmark]: Toolchain (without parser) took 3515.54 ms. Allocated memory was 141.0 MB in the beginning and 247.5 MB in the end (delta: 106.4 MB). Free memory was 102.2 MB in the beginning and 162.5 MB in the end (delta: -60.3 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,824 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.63 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,830 INFO L168 Benchmark]: Boogie Preprocessor took 111.82 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 91.7 MB in the beginning and 181.3 MB in the end (delta: -89.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,838 INFO L168 Benchmark]: RCFGBuilder took 281.35 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 167.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,839 INFO L168 Benchmark]: TraceAbstraction took 2836.84 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 162.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. [2020-10-12 16:08:53,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.63 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.82 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 91.7 MB in the beginning and 181.3 MB in the end (delta: -89.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.35 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 167.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2836.84 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 162.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: 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_72) == __return_72 && (!(main__j == main__i) || (main__x <= main__y && main__y <= main__x)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 64 SDslu, 99 SDs, 0 SdLazy, 140 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 8 NumberOfFragments, 28 HoareAnnotationTreeSize, 5 FomulaSimplifications, 120 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 56 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 3765 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 1/10 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...