/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:06:34,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:06:34,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:06:34,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:06:34,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:06:34,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:06:34,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:06:34,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:06:34,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:06:34,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:06:34,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:06:34,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:06:34,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:06:34,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:06:34,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:06:34,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:06:34,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:06:34,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:06:34,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:06:34,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:06:34,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:06:34,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:06:34,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:06:34,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:06:34,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:06:34,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:06:34,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:06:34,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:06:34,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:06:34,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:06:34,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:06:34,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:06:34,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:06:34,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:06:34,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:06:34,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:06:34,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:06:34,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:06:34,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:06:34,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:06:34,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:06:34,986 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 [2020-10-28 09:06:35,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:06:35,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:06:35,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:06:35,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:06:35,016 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:06:35,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:06:35,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:06:35,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:06:35,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:06:35,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:06:35,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:06:35,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:06:35,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:06:35,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:06:35,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:06:35,019 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:06:35,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:06:35,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:06:35,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:06:35,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:06:35,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:06:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:06:35,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:06:35,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:06:35,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:06:35,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:06:35,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:06:35,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:06:35,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:06:35,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:06:35,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:06:35,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:06:35,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:06:35,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:06:35,430 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:06:35,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-28 09:06:35,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c18c8c4b1/c4581ea0e825461c99622470681c6d0b/FLAG3fc19b8c6 [2020-10-28 09:06:36,141 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:06:36,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-28 09:06:36,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c18c8c4b1/c4581ea0e825461c99622470681c6d0b/FLAG3fc19b8c6 [2020-10-28 09:06:36,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c18c8c4b1/c4581ea0e825461c99622470681c6d0b [2020-10-28 09:06:36,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:06:36,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:06:36,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:36,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:06:36,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:06:36,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677c02ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36, skipping insertion in model container [2020-10-28 09:06:36,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:06:36,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:06:36,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:36,753 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:06:36,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:36,789 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:06:36,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36 WrapperNode [2020-10-28 09:06:36,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:36,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:06:36,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:06:36,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:06:36,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (1/1) ... [2020-10-28 09:06:36,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:06:36,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:06:36,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:06:36,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:06:36,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (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 [2020-10-28 09:06:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:06:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:06:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:06:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:06:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:06:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:06:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:06:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:06:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:06:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:06:37,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:06:37,198 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:06:37,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:37 BoogieIcfgContainer [2020-10-28 09:06:37,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:06:37,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:06:37,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:06:37,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:06:37,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:06:36" (1/3) ... [2020-10-28 09:06:37,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3cc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:37, skipping insertion in model container [2020-10-28 09:06:37,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:36" (2/3) ... [2020-10-28 09:06:37,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3cc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:37, skipping insertion in model container [2020-10-28 09:06:37,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:37" (3/3) ... [2020-10-28 09:06:37,212 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2020-10-28 09:06:37,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:06:37,235 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:06:37,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:06:37,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:06:37,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:06:37,288 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:06:37,288 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:06:37,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:06:37,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:06:37,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:06:37,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:06:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 09:06:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:06:37,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:37,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:37,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:37,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1039837916, now seen corresponding path program 1 times [2020-10-28 09:06:37,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:37,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265397578] [2020-10-28 09:06:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:06:38,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:38,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 09:06:38,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:06:38,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:06:38,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:38,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:38,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:06:38,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:38,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265397578] [2020-10-28 09:06:38,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:38,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:06:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547364486] [2020-10-28 09:06:38,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:06:38,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:06:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:06:38,330 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-28 09:06:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:38,413 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-28 09:06:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:06:38,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 09:06:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:38,423 INFO L225 Difference]: With dead ends: 45 [2020-10-28 09:06:38,423 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 09:06:38,426 INFO L677 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 [2020-10-28 09:06:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 09:06:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 09:06:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 09:06:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-28 09:06:38,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-28 09:06:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:38,468 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-28 09:06:38,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:06:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-28 09:06:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:06:38,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:38,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:38,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:06:38,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash 971041850, now seen corresponding path program 1 times [2020-10-28 09:06:38,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:38,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737400096] [2020-10-28 09:06:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:06:38,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:38,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-28 09:06:38,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:06:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:38,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:06:38,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:38,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:38,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:38,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:06:38,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:38,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737400096] [2020-10-28 09:06:38,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:38,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:06:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382444042] [2020-10-28 09:06:38,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:06:38,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:06:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:06:38,820 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-10-28 09:06:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:38,886 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 09:06:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:06:38,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 09:06:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:38,888 INFO L225 Difference]: With dead ends: 30 [2020-10-28 09:06:38,888 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 09:06:38,889 INFO L677 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 [2020-10-28 09:06:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 09:06:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-28 09:06:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 09:06:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 09:06:38,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 09:06:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:38,898 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 09:06:38,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:06:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 09:06:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 09:06:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:38,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:38,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:06:38,900 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash -634597988, now seen corresponding path program 1 times [2020-10-28 09:06:38,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:38,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216651392] [2020-10-28 09:06:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:06:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 09:06:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:06:39,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:39,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:39,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:39,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:39,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:06:39,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216651392] [2020-10-28 09:06:39,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:39,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 09:06:39,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856009006] [2020-10-28 09:06:39,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:06:39,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:06:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:39,335 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-28 09:06:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:39,477 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-28 09:06:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:06:39,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 09:06:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:39,478 INFO L225 Difference]: With dead ends: 28 [2020-10-28 09:06:39,478 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:06:39,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:06:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:06:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:06:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 09:06:39,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 09:06:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:39,486 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 09:06:39,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:06:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 09:06:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 09:06:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:39,487 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:39,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:06:39,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 536394529, now seen corresponding path program 1 times [2020-10-28 09:06:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957773972] [2020-10-28 09:06:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:39,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 09:06:39,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:39,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:06:39,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:39,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:39,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:39,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:39,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:39,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:06:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957773972] [2020-10-28 09:06:39,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:39,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:06:39,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549502423] [2020-10-28 09:06:39,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:39,838 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 09:06:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:39,888 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 09:06:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:39,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 09:06:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:39,890 INFO L225 Difference]: With dead ends: 36 [2020-10-28 09:06:39,890 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 09:06:39,891 INFO L677 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 [2020-10-28 09:06:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 09:06:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 09:06:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:06:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-28 09:06:39,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-28 09:06:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:39,897 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-28 09:06:39,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-28 09:06:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:06:39,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:39,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:39,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:06:39,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash 181476227, now seen corresponding path program 2 times [2020-10-28 09:06:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:39,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205102059] [2020-10-28 09:06:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:06:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-28 09:06:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:40,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:06:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:06:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:06:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:40,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:40,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:40,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:40,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:40,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:40,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:06:40,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205102059] [2020-10-28 09:06:40,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:40,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:06:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557066210] [2020-10-28 09:06:40,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:06:40,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:40,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:06:40,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:40,464 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-28 09:06:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:40,640 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-28 09:06:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:06:40,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 09:06:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:40,642 INFO L225 Difference]: With dead ends: 32 [2020-10-28 09:06:40,642 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:06:40,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:06:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:06:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 09:06:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:06:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 09:06:40,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-28 09:06:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:40,652 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 09:06:40,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:06:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 09:06:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:06:40,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:40,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:40,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:06:40,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1195300024, now seen corresponding path program 3 times [2020-10-28 09:06:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:40,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747727896] [2020-10-28 09:06:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:41,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:41,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:06:41,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:41,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-28 09:06:41,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:41,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:06:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:06:41,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:41,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:41,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:41,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:41,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:06:41,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747727896] [2020-10-28 09:06:41,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:41,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:06:41,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779119374] [2020-10-28 09:06:41,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:06:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:06:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:41,303 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-28 09:06:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:41,372 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 09:06:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:06:41,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 09:06:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:41,374 INFO L225 Difference]: With dead ends: 42 [2020-10-28 09:06:41,374 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 09:06:41,374 INFO L677 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 [2020-10-28 09:06:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 09:06:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 09:06:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:06:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-28 09:06:41,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-28 09:06:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:41,384 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-28 09:06:41,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:06:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-28 09:06:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:06:41,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:41,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:41,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:06:41,386 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash -976319830, now seen corresponding path program 4 times [2020-10-28 09:06:41,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:41,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404954129] [2020-10-28 09:06:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:41,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:42,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:42,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:06:42,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:42,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 09:06:42,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:42,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:06:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:06:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:06:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:42,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:42,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:42,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:42,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:42,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:42,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:42,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:06:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404954129] [2020-10-28 09:06:42,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:42,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:06:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637653353] [2020-10-28 09:06:42,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:06:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:06:42,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:06:42,482 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-28 09:06:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:42,589 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-28 09:06:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:06:42,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 09:06:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:42,590 INFO L225 Difference]: With dead ends: 27 [2020-10-28 09:06:42,590 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 09:06:42,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:06:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 09:06:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 09:06:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 09:06:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 09:06:42,592 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-28 09:06:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:42,592 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 09:06:42,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:06:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 09:06:42,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 09:06:42,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:06:42,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 09:06:42,688 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 09:06:42,688 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 09:06:42,688 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 09:06:42,688 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 09:06:42,688 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 09:06:42,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 09:06:42,689 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 09:06:42,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 09:06:42,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 09:06:42,689 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 09:06:42,689 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 09:06:42,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 09:06:42,689 INFO L274 CegarLoopResult]: For program point L25(lines 25 32) no Hoare annotation was computed. [2020-10-28 09:06:42,690 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 34) no Hoare annotation was computed. [2020-10-28 09:06:42,690 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 34) no Hoare annotation was computed. [2020-10-28 09:06:42,690 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 15 34) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-28 09:06:42,690 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2020-10-28 09:06:42,690 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (<= main_~i~1 main_~pos~0) (= (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~pos~0 4) |main_~#a~0.offset|)) main_~marker~0)) [2020-10-28 09:06:42,690 INFO L270 CegarLoopResult]: At program point L28-4(lines 28 30) the Hoare annotation is: (<= main_~i~1 main_~pos~0) [2020-10-28 09:06:42,690 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2020-10-28 09:06:42,691 INFO L277 CegarLoopResult]: At program point L20-3(lines 20 23) the Hoare annotation is: true [2020-10-28 09:06:42,691 INFO L274 CegarLoopResult]: For program point L20-4(lines 15 34) no Hoare annotation was computed. [2020-10-28 09:06:42,691 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 14) the Hoare annotation is: true [2020-10-28 09:06:42,691 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-10-28 09:06:42,691 INFO L270 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 09:06:42,691 INFO L274 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-10-28 09:06:42,691 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-10-28 09:06:42,691 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 14) no Hoare annotation was computed. [2020-10-28 09:06:42,703 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-28 09:06:42,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-28 09:06:42,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:06:42 BoogieIcfgContainer [2020-10-28 09:06:42,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:06:42,714 INFO L168 Benchmark]: Toolchain (without parser) took 6188.62 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.5 MB in the beginning and 127.5 MB in the end (delta: -1.9 MB). Peak memory consumption was 66.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:06:42,715 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:06:42,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.92 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:06:42,716 INFO L168 Benchmark]: Boogie Preprocessor took 38.14 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 09:06:42,717 INFO L168 Benchmark]: RCFGBuilder took 370.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 99.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:06:42,718 INFO L168 Benchmark]: TraceAbstraction took 5508.81 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 99.3 MB in the beginning and 127.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 40.5 MB. Max. memory is 8.0 GB. [2020-10-28 09:06:42,722 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.92 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.14 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 370.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 99.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5508.81 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 99.3 MB in the beginning and 127.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 40.5 MB. Max. memory is 8.0 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: 12]: 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: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant [2020-10-28 09:06:42,730 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-28 09:06:42,730 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: i <= pos && unknown-#memory_int-unknown[a][pos * 4 + a] == marker - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 41 SDslu, 190 SDs, 0 SdLazy, 241 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 28 PreInvPairs, 35 NumberOfFragments, 58 HoareAnnotationTreeSize, 28 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 89 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 9634 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 22/35 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...