/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:45,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:45,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:45,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:45,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:45,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:45,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:45,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:45,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:45,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:45,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:45,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:45,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:45,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:45,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:45,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:45,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:45,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:45,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:45,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:45,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:45,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:45,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:45,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:45,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:45,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:45,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:45,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:45,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:45,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:45,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:45,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:45,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:45,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:45,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:45,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:45,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:45,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:45,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:45,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:45,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:45,356 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 [2020-10-13 23:42:45,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:45,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:45,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:45,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:45,396 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:45,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:45,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:45,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:45,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:45,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:45,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:45,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:45,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:45,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:45,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:45,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:45,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:45,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:45,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:45,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:45,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:45,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:45,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:45,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:45,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:45,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:45,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:45,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:45,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:45,401 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:42:45,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:45,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:45,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:45,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:45,696 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:45,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2020-10-13 23:42:45,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bf8de7c6/f849a082b10c4b51a98a70f97a6243ef/FLAGc83164e04 [2020-10-13 23:42:46,197 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:46,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2020-10-13 23:42:46,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bf8de7c6/f849a082b10c4b51a98a70f97a6243ef/FLAGc83164e04 [2020-10-13 23:42:46,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bf8de7c6/f849a082b10c4b51a98a70f97a6243ef [2020-10-13 23:42:46,553 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:46,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:46,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:46,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:46,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:46,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46, skipping insertion in model container [2020-10-13 23:42:46,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:46,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:46,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:46,790 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:46,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:46,835 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:46,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46 WrapperNode [2020-10-13 23:42:46,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:46,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:46,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:46,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:46,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (1/1) ... [2020-10-13 23:42:46,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:46,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:46,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:46,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:46,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (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 [2020-10-13 23:42:47,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:47,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:47,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:47,270 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:47,271 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 23:42:47,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:47 BoogieIcfgContainer [2020-10-13 23:42:47,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:47,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:47,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:47,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:47,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:46" (1/3) ... [2020-10-13 23:42:47,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c877572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:47, skipping insertion in model container [2020-10-13 23:42:47,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:46" (2/3) ... [2020-10-13 23:42:47,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c877572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:47, skipping insertion in model container [2020-10-13 23:42:47,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:47" (3/3) ... [2020-10-13 23:42:47,304 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2020-10-13 23:42:47,328 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:47,336 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:47,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:47,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:47,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:47,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:47,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:47,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:47,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:47,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:47,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 23:42:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:42:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:47,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:47,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1429065311, now seen corresponding path program 1 times [2020-10-13 23:42:47,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:47,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627475422] [2020-10-13 23:42:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:47,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:47,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:42:47,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:47,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-13 23:42:47,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:47,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:42:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:42:47,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:47,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:47,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:47,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:47,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:42:47,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:47,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:47,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627475422] [2020-10-13 23:42:47,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:47,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:47,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205228834] [2020-10-13 23:42:47,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:47,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:48,004 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 23:42:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:48,082 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-13 23:42:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:48,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 23:42:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:48,094 INFO L225 Difference]: With dead ends: 30 [2020-10-13 23:42:48,095 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 23:42:48,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 23:42:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 23:42:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 23:42:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 23:42:48,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 23:42:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:48,140 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 23:42:48,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 23:42:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:42:48,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:48,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:48,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:48,143 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash 399010521, now seen corresponding path program 1 times [2020-10-13 23:42:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:48,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135297626] [2020-10-13 23:42:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:48,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:42:48,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:48,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-13 23:42:48,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:48,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:48,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:48,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:48,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:48,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:48,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:48,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:48,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:48,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:48,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135297626] [2020-10-13 23:42:48,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:48,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:48,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982123184] [2020-10-13 23:42:48,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:48,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:48,406 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 23:42:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:48,459 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 23:42:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:48,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 23:42:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:48,461 INFO L225 Difference]: With dead ends: 24 [2020-10-13 23:42:48,462 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 23:42:48,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 23:42:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-13 23:42:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 23:42:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 23:42:48,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-13 23:42:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:48,470 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 23:42:48,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 23:42:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:48,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:48,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:48,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:48,472 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1207654839, now seen corresponding path program 1 times [2020-10-13 23:42:48,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:48,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24659484] [2020-10-13 23:42:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:48,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:42:48,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:48,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 23:42:48,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:48,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:42:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:42:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:48,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:48,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:48,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:48,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:48,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24659484] [2020-10-13 23:42:48,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:48,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:42:48,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919108040] [2020-10-13 23:42:48,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:48,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:48,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:48,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:48,795 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-13 23:42:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:48,863 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-10-13 23:42:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:48,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 23:42:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:48,864 INFO L225 Difference]: With dead ends: 21 [2020-10-13 23:42:48,864 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 23:42:48,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 23:42:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 23:42:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 23:42:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 23:42:48,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-13 23:42:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:48,871 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 23:42:48,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 23:42:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:42:48,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:48,872 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:48,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:48,873 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 913042234, now seen corresponding path program 1 times [2020-10-13 23:42:48,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:48,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-10-13 23:42:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:48,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:49,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 23:42:49,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:42:49,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:49,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:49,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:49,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-10-13 23:42:49,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:49,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:49,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28113738] [2020-10-13 23:42:49,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:49,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:49,108 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-13 23:42:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:49,151 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-13 23:42:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:49,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 23:42:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:49,153 INFO L225 Difference]: With dead ends: 30 [2020-10-13 23:42:49,153 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 23:42:49,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 23:42:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-13 23:42:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:42:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 23:42:49,159 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-13 23:42:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:49,159 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 23:42:49,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 23:42:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:42:49,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:49,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:49,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:49,161 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 598752024, now seen corresponding path program 2 times [2020-10-13 23:42:49,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:49,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104809249] [2020-10-13 23:42:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:42:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-13 23:42:49,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:42:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:49,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:49,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:49,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:49,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:49,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104809249] [2020-10-13 23:42:49,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:49,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:49,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224852780] [2020-10-13 23:42:49,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:49,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:49,584 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-13 23:42:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:49,641 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 23:42:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:49,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:42:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:49,642 INFO L225 Difference]: With dead ends: 32 [2020-10-13 23:42:49,643 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 23:42:49,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 23:42:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 23:42:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:42:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 23:42:49,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-13 23:42:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:49,650 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 23:42:49,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 23:42:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:42:49,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:49,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:49,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:49,652 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -786429066, now seen corresponding path program 3 times [2020-10-13 23:42:49,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:49,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203643290] [2020-10-13 23:42:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:50,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:42:50,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:50,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 23:42:50,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:50,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:50,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:50,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:50,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:50,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:50,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:50,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:50,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203643290] [2020-10-13 23:42:50,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:50,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:50,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132455614] [2020-10-13 23:42:50,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:50,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:50,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:50,398 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-13 23:42:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:50,461 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 23:42:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:50,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 23:42:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:50,463 INFO L225 Difference]: With dead ends: 34 [2020-10-13 23:42:50,463 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:42:50,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:42:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 23:42:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:42:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 23:42:50,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-13 23:42:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:50,469 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 23:42:50,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 23:42:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:42:50,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:50,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:50,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:42:50,471 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -505594796, now seen corresponding path program 4 times [2020-10-13 23:42:50,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:50,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126984610] [2020-10-13 23:42:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:50,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:42:50,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:50,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:42:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:50,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:50,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:50,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:50,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:50,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:50,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:50,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:50,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:50,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126984610] [2020-10-13 23:42:50,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:50,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:42:50,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004226375] [2020-10-13 23:42:50,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:42:50,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:42:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:50,981 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-13 23:42:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:51,030 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 23:42:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:42:51,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 23:42:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:51,032 INFO L225 Difference]: With dead ends: 36 [2020-10-13 23:42:51,032 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:42:51,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:42:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 23:42:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:42:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 23:42:51,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-13 23:42:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:51,039 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 23:42:51,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:42:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 23:42:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:42:51,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:51,040 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:51,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:42:51,040 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1206800974, now seen corresponding path program 5 times [2020-10-13 23:42:51,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:51,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963767698] [2020-10-13 23:42:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:51,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:42:51,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-13 23:42:51,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:51,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:42:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:42:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:51,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:51,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:51,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:51,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:51,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:51,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963767698] [2020-10-13 23:42:51,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:51,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:42:51,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339129770] [2020-10-13 23:42:51,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:42:51,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:51,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:42:51,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:51,639 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-13 23:42:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:51,698 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 23:42:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:42:51,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:42:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:51,700 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:42:51,700 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:42:51,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:42:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 23:42:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:42:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 23:42:51,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-13 23:42:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:51,707 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 23:42:51,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:42:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 23:42:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:42:51,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:51,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:51,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:42:51,709 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:51,709 INFO L82 PathProgramCache]: Analyzing trace with hash -756072560, now seen corresponding path program 6 times [2020-10-13 23:42:51,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:51,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969072932] [2020-10-13 23:42:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:52,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:42:52,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:52,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-13 23:42:52,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:52,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:42:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:42:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:52,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:52,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:52,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:52,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:52,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:52,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:52,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:52,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:52,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:52,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969072932] [2020-10-13 23:42:52,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:52,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:42:52,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152481455] [2020-10-13 23:42:52,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:42:52,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:42:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:52,373 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 10 states. [2020-10-13 23:42:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:52,447 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 23:42:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:42:52,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 23:42:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:52,449 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:42:52,449 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:42:52,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:42:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 23:42:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:42:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 23:42:52,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-13 23:42:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:52,455 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 23:42:52,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:42:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 23:42:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:42:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:52,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:52,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:42:52,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1397763602, now seen corresponding path program 7 times [2020-10-13 23:42:52,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:52,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706188968] [2020-10-13 23:42:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:52,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:53,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:42:53,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:53,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-13 23:42:53,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:53,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:53,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:42:53,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:42:53,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:42:53,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:53,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:53,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:53,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:53,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:53,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:53,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:53,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:53,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:42:53,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706188968] [2020-10-13 23:42:53,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:53,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:42:53,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999274523] [2020-10-13 23:42:53,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:42:53,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:42:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:53,257 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2020-10-13 23:42:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:53,386 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-13 23:42:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:42:53,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 23:42:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:53,388 INFO L225 Difference]: With dead ends: 35 [2020-10-13 23:42:53,388 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:42:53,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:42:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:42:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 23:42:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:42:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 23:42:53,394 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-13 23:42:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:53,394 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 23:42:53,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:42:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 23:42:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:42:53,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:53,395 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:53,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:42:53,396 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1071854001, now seen corresponding path program 8 times [2020-10-13 23:42:53,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:53,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20891203] [2020-10-13 23:42:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:53,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:42:54,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:54,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-13 23:42:54,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:42:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:42:54,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:54,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:54,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:54,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:54,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:54,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:42:54,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20891203] [2020-10-13 23:42:54,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:54,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:42:54,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381682122] [2020-10-13 23:42:54,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:42:54,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:42:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:42:54,433 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2020-10-13 23:42:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:54,493 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 23:42:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:42:54,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-13 23:42:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:54,495 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:42:54,495 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:42:54,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:42:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:42:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 23:42:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:42:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 23:42:54,500 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-13 23:42:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:54,501 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 23:42:54,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:42:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 23:42:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:42:54,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:54,502 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:54,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:42:54,502 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1211589903, now seen corresponding path program 9 times [2020-10-13 23:42:54,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:54,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900798251] [2020-10-13 23:42:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:55,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:42:55,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:55,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-13 23:42:55,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:55,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:55,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:42:55,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:42:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:55,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:55,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:55,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:55,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:55,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:55,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:42:55,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900798251] [2020-10-13 23:42:55,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:55,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:42:55,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339472586] [2020-10-13 23:42:55,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:42:55,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:42:55,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:42:55,807 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 12 states. [2020-10-13 23:42:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:55,897 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 23:42:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:42:55,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-13 23:42:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:55,899 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:42:55,899 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:42:55,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:42:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:42:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 23:42:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:42:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 23:42:55,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-13 23:42:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:55,906 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 23:42:55,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:42:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 23:42:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:42:55,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:55,907 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:55,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:42:55,907 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1941161747, now seen corresponding path program 10 times [2020-10-13 23:42:55,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:55,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744295418] [2020-10-13 23:42:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:57,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:42:57,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:57,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-10-13 23:42:57,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:57,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:42:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:42:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:57,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:57,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:57,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:42:57,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744295418] [2020-10-13 23:42:57,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:57,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:42:57,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212729837] [2020-10-13 23:42:57,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:42:57,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:42:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:42:57,541 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-10-13 23:42:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:57,615 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 23:42:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:42:57,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-13 23:42:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:57,617 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:42:57,617 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:42:57,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:42:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:42:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 23:42:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:42:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 23:42:57,629 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-13 23:42:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:57,633 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 23:42:57,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:42:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 23:42:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:42:57,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:57,634 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:57,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:42:57,635 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 511413579, now seen corresponding path program 11 times [2020-10-13 23:42:57,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:57,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813433700] [2020-10-13 23:42:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:57,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:59,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:42:59,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:59,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-13 23:42:59,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:59,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:42:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:42:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:42:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:59,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:59,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:59,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:59,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:59,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:59,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:42:59,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813433700] [2020-10-13 23:42:59,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:59,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:42:59,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981572988] [2020-10-13 23:42:59,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:42:59,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:42:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:59,684 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 10 states. [2020-10-13 23:42:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:59,769 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-13 23:42:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:59,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-13 23:42:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:59,770 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:42:59,770 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 23:42:59,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:42:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 23:42:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 23:42:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 23:42:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 23:42:59,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-13 23:42:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:59,772 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 23:42:59,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:42:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 23:42:59,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 23:42:59,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:42:59,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 23:42:59,824 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 23:42:59,824 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= ~__return_60~0 |old(~__return_60~0)|)) [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 23:42:59,825 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 23:42:59,825 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point L27(lines 27 50) no Hoare annotation was computed. [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 7 61) no Hoare annotation was computed. [2020-10-13 23:42:59,825 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-10-13 23:42:59,826 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 7 61) no Hoare annotation was computed. [2020-10-13 23:42:59,826 INFO L271 CegarLoopResult]: At program point L15-3(lines 15 18) the Hoare annotation is: true [2020-10-13 23:42:59,826 INFO L268 CegarLoopResult]: For program point L15-4(lines 8 61) no Hoare annotation was computed. [2020-10-13 23:42:59,826 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2020-10-13 23:42:59,826 INFO L264 CegarLoopResult]: At program point L30(lines 23 51) the Hoare annotation is: (and (= main_~main__marker~0 (select (select |#memory_int| |main_~#main__a~0.base|) (+ |main_~#main__a~0.offset| (* main_~main__pos~0 4)))) (<= 0 main_~main__pos~0) (<= main_~main__i~0 main_~main__pos~0)) [2020-10-13 23:42:59,826 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 7 61) the Hoare annotation is: (and (= |old(#valid)| |#valid|) (= |old(~__return_60~0)| ~__return_60~0)) [2020-10-13 23:42:59,827 INFO L268 CegarLoopResult]: For program point L22(lines 22 55) no Hoare annotation was computed. [2020-10-13 23:42:59,827 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-10-13 23:42:59,827 INFO L268 CegarLoopResult]: For program point L39(lines 39 48) no Hoare annotation was computed. [2020-10-13 23:42:59,839 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 23:42:59,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 23:42:59,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:42:59 BoogieIcfgContainer [2020-10-13 23:42:59,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 23:42:59,849 INFO L168 Benchmark]: Toolchain (without parser) took 13293.87 ms. Allocated memory was 147.8 MB in the beginning and 410.5 MB in the end (delta: 262.7 MB). Free memory was 104.4 MB in the beginning and 273.6 MB in the end (delta: -169.3 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,850 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.20 ms. Allocated memory is still 147.8 MB. Free memory was 104.1 MB in the beginning and 94.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,851 INFO L168 Benchmark]: Boogie Preprocessor took 127.80 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.9 MB in the beginning and 181.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,855 INFO L168 Benchmark]: RCFGBuilder took 311.38 ms. Allocated memory is still 203.9 MB. Free memory was 181.8 MB in the beginning and 167.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,856 INFO L168 Benchmark]: TraceAbstraction took 12556.23 ms. Allocated memory was 203.9 MB in the beginning and 410.5 MB in the end (delta: 206.6 MB). Free memory was 166.5 MB in the beginning and 273.6 MB in the end (delta: -107.1 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2020-10-13 23:42:59,861 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 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.20 ms. Allocated memory is still 147.8 MB. Free memory was 104.1 MB in the beginning and 94.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.80 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.9 MB in the beginning and 181.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.38 ms. Allocated memory is still 203.9 MB. Free memory was 181.8 MB in the beginning and 167.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12556.23 ms. Allocated memory was 203.9 MB in the beginning and 410.5 MB in the end (delta: 206.6 MB). Free memory was 166.5 MB in the beginning and 273.6 MB in the end (delta: -107.1 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant [2020-10-13 23:42:59,874 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-13 23:42:59,874 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (main__marker == unknown-#memory_int-unknown[main__a][main__a + main__pos * 4] && 0 <= main__pos) && main__i <= main__pos - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.3s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 78 SDslu, 556 SDs, 0 SdLazy, 487 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=13, 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, 14 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 18 NumberOfFragments, 44 HoareAnnotationTreeSize, 6 FomulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 324 ConstructedInterpolants, 0 QuantifiedInterpolants, 22562 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 180/473 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...