/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=1.0 --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.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:11:46,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:11:46,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:11:46,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:11:46,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:11:46,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:11:46,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:11:46,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:11:46,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:11:46,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:11:46,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:11:46,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:11:46,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:11:46,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:11:46,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:11:46,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:11:46,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:11:46,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:11:46,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:11:46,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:11:46,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:11:46,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:11:46,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:11:46,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:11:46,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:11:46,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:11:46,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:11:46,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:11:46,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:11:46,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:11:46,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:11:46,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:11:46,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:11:46,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:11:46,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:11:46,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:11:46,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:11:46,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:11:46,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:11:46,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:11:46,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:11:46,968 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 09:11:47,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:11:47,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:11:47,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:11:47,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:11:47,021 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:11:47,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:11:47,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:11:47,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:11:47,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:11:47,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:11:47,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:11:47,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:11:47,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:11:47,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:11:47,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:11:47,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:11:47,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:11:47,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:11:47,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:11:47,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:11:47,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:11:47,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:11:47,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:11:47,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:11:47,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:11:47,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:11:47,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:11:47,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:11:47,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:11:47,028 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:11:47,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:11:47,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:11:47,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:11:47,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:11:47,539 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:11:47,540 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-25 09:11:47,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1cf48977/15627bf46c11433db8252f50dc52bca6/FLAGc60bccea1 [2020-09-25 09:11:48,183 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:11:48,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-25 09:11:48,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1cf48977/15627bf46c11433db8252f50dc52bca6/FLAGc60bccea1 [2020-09-25 09:11:48,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1cf48977/15627bf46c11433db8252f50dc52bca6 [2020-09-25 09:11:48,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:11:48,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:11:48,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:48,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:11:48,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:11:48,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,552 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 09:11:48, skipping insertion in model container [2020-09-25 09:11:48,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:11:48,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:11:48,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:48,810 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:11:48,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:48,849 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:11:48,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48 WrapperNode [2020-09-25 09:11:48,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:48,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:11:48,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:11:48,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:11:48,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (1/1) ... [2020-09-25 09:11:48,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:11:48,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:11:48,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:11:48,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:11:48,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (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 09:11:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:11:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:11:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:11:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:11:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:11:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:11:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:11:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:11:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:11:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:11:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:11:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:11:49,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:11:49,291 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:11:49,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:49 BoogieIcfgContainer [2020-09-25 09:11:49,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:11:49,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:11:49,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:11:49,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:11:49,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:11:48" (1/3) ... [2020-09-25 09:11:49,319 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 09:11:49, skipping insertion in model container [2020-09-25 09:11:49,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:48" (2/3) ... [2020-09-25 09:11:49,326 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 09:11:49, skipping insertion in model container [2020-09-25 09:11:49,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:49" (3/3) ... [2020-09-25 09:11:49,330 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2020-09-25 09:11:49,358 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:11:49,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:11:49,402 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:11:49,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:11:49,435 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:11:49,435 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:11:49,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:11:49,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:11:49,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:11:49,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:11:49,436 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:11:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-25 09:11:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 09:11:49,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:49,469 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 09:11:49,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:49,476 INFO L82 PathProgramCache]: Analyzing trace with hash 341466613, now seen corresponding path program 1 times [2020-09-25 09:11:49,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:49,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619247000] [2020-09-25 09:11:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 09:11:49,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 09:11:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:11:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:11:49,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:49,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:49,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:49,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:11:49,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:49,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:49,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:49,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:49,787 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 09:11:49,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619247000] [2020-09-25 09:11:49,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:49,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:11:49,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836753628] [2020-09-25 09:11:49,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:11:49,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:11:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:11:49,821 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-09-25 09:11:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:49,968 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-25 09:11:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:11:49,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-25 09:11:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:49,985 INFO L225 Difference]: With dead ends: 51 [2020-09-25 09:11:49,985 INFO L226 Difference]: Without dead ends: 27 [2020-09-25 09:11:49,990 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 09:11:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-25 09:11:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-25 09:11:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 09:11:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-25 09:11:50,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2020-09-25 09:11:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:50,036 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-25 09:11:50,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:11:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-25 09:11:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 09:11:50,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:50,038 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 09:11:50,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:11:50,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 178703795, now seen corresponding path program 1 times [2020-09-25 09:11:50,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:50,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576150110] [2020-09-25 09:11:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 09:11:50,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:50,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-09-25 09:11:50,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 09:11:50,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:50,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:11:50,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:11:50,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:50,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:50,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:50,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,610 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 09:11:50,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576150110] [2020-09-25 09:11:50,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:50,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:50,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646418088] [2020-09-25 09:11:50,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:50,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:50,615 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-25 09:11:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:50,900 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-25 09:11:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:11:50,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-25 09:11:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:50,902 INFO L225 Difference]: With dead ends: 38 [2020-09-25 09:11:50,902 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:11:50,904 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 09:11:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:11:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-25 09:11:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 09:11:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-09-25 09:11:50,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-09-25 09:11:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:50,912 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-09-25 09:11:50,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-09-25 09:11:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 09:11:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:50,914 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 09:11:50,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:11:50,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 563687025, now seen corresponding path program 2 times [2020-09-25 09:11:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:50,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229318780] [2020-09-25 09:11:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:51,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:11:51,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:51,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-09-25 09:11:51,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:51,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:51,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:51,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:51,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:11:51,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:51,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:51,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:51,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:51,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:51,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:51,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:51,452 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 09:11:51,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229318780] [2020-09-25 09:11:51,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:51,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:51,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581494232] [2020-09-25 09:11:51,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:51,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:51,455 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-09-25 09:11:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:51,723 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-25 09:11:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:51,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-25 09:11:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:51,726 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:11:51,726 INFO L226 Difference]: Without dead ends: 35 [2020-09-25 09:11:51,727 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 09:11:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-25 09:11:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-25 09:11:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 09:11:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-25 09:11:51,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2020-09-25 09:11:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:51,735 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-25 09:11:51,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-25 09:11:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 09:11:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:51,737 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 09:11:51,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:11:51,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1026490321, now seen corresponding path program 3 times [2020-09-25 09:11:51,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:51,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036202995] [2020-09-25 09:11:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:52,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:52,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:11:52,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:11:52,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-09-25 09:11:52,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:52,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 09:11:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 09:11:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:52,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:52,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:52,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:52,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:52,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:52,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:52,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:52,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:52,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036202995] [2020-09-25 09:11:52,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:52,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:11:52,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705605148] [2020-09-25 09:11:52,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:11:52,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:11:52,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:11:52,696 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2020-09-25 09:11:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:53,052 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 09:11:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:53,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 09:11:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:53,054 INFO L225 Difference]: With dead ends: 46 [2020-09-25 09:11:53,054 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 09:11:53,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:11:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 09:11:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-25 09:11:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 09:11:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 09:11:53,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2020-09-25 09:11:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:53,064 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 09:11:53,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:11:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 09:11:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:11:53,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:53,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:53,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:11:53,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2083373805, now seen corresponding path program 4 times [2020-09-25 09:11:53,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:53,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506473285] [2020-09-25 09:11:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:54,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:54,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 09:11:54,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:54,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-09-25 09:11:54,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:54,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 09:11:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:54,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 09:11:54,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:54,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:54,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:54,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:54,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:54,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:54,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:54,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:54,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:11:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:54,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506473285] [2020-09-25 09:11:54,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:54,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:11:54,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736569221] [2020-09-25 09:11:54,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:11:54,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:11:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:11:54,617 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2020-09-25 09:11:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:55,083 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-25 09:11:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:11:55,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-25 09:11:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:55,084 INFO L225 Difference]: With dead ends: 50 [2020-09-25 09:11:55,084 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 09:11:55,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-09-25 09:11:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 09:11:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-25 09:11:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 09:11:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 09:11:55,096 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2020-09-25 09:11:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:55,098 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 09:11:55,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:11:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 09:11:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 09:11:55,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:55,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:55,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:11:55,100 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash -540084565, now seen corresponding path program 5 times [2020-09-25 09:11:55,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:55,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317732736] [2020-09-25 09:11:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:56,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:56,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 09:11:56,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:11:56,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-09-25 09:11:56,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:56,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 09:11:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 09:11:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:11:56,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:56,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:56,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:56,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:56,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:56,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:56,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:56,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:11:56,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317732736] [2020-09-25 09:11:56,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:56,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:11:56,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326184417] [2020-09-25 09:11:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:11:56,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:11:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:11:56,614 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 15 states. [2020-09-25 09:11:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:57,324 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-25 09:11:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 09:11:57,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-25 09:11:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:57,325 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:11:57,325 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 09:11:57,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2020-09-25 09:11:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 09:11:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 09:11:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 09:11:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 09:11:57,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-25 09:11:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:57,330 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 09:11:57,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:11:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 09:11:57,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 09:11:57,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:11:57,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 09:11:57,454 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-25 09:11:57,454 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-25 09:11:57,454 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_144~0 |old(~__return_144~0)|)) [2020-09-25 09:11:57,454 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:11:57,455 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:11:57,455 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 09:11:57,456 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 09:11:57,456 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 09:11:57,456 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-25 09:11:57,456 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 09:11:57,456 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-25 09:11:57,457 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-25 09:11:57,457 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-25 09:11:57,457 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-25 09:11:57,457 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-25 09:11:57,457 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 09:11:57,458 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-25 09:11:57,459 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-09-25 09:11:57,460 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-25 09:11:57,460 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-25 09:11:57,460 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 09:11:57,460 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 09:11:57,460 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-25 09:11:57,461 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 09:11:57,461 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 09:11:57,461 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-25 09:11:57,461 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-25 09:11:57,462 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 11) (* 4 main_~main__y~0)) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2020-09-25 09:11:57,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:11:57 BoogieIcfgContainer [2020-09-25 09:11:57,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:11:57,496 INFO L168 Benchmark]: Toolchain (without parser) took 8956.35 ms. Allocated memory was 140.0 MB in the beginning and 281.5 MB in the end (delta: 141.6 MB). Free memory was 102.2 MB in the beginning and 114.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 129.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,497 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.58 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,504 INFO L168 Benchmark]: Boogie Preprocessor took 109.66 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 181.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,505 INFO L168 Benchmark]: RCFGBuilder took 338.40 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,506 INFO L168 Benchmark]: TraceAbstraction took 8178.65 ms. Allocated memory was 202.4 MB in the beginning and 281.5 MB in the end (delta: 79.2 MB). Free memory was 167.6 MB in the beginning and 114.4 MB in the end (delta: 53.2 MB). Peak memory consumption was 132.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:11:57,519 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.58 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.66 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 181.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.40 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8178.65 ms. Allocated memory was 202.4 MB in the beginning and 281.5 MB in the end (delta: 79.2 MB). Free memory was 167.6 MB in the beginning and 114.4 MB in the end (delta: 53.2 MB). Peak memory consumption was 132.4 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_144) == __return_144 && main__x + 50 <= 0) || ((main__x + 11 <= 4 * main__y && main__x + 2 <= main__y) && \old(__return_144) == __return_144) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 283 SDslu, 239 SDs, 0 SdLazy, 1025 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 10 NumberOfFragments, 38 HoareAnnotationTreeSize, 5 FomulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 84 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 21988 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 21/95 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...