/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:42:25,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:42:25,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:42:25,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:42:25,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:42:25,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:42:25,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:42:25,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:42:25,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:42:25,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:42:25,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:42:25,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:42:25,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:42:25,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:42:25,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:42:25,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:42:25,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:42:25,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:42:25,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:42:26,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:42:26,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:42:26,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:42:26,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:42:26,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:42:26,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:42:26,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:42:26,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:42:26,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:42:26,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:42:26,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:42:26,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:42:26,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:42:26,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:42:26,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:42:26,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:42:26,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:42:26,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:42:26,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:42:26,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:42:26,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:42:26,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:42:26,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:42:26,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:42:26,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:42:26,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:42:26,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:42:26,088 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:42:26,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:42:26,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:42:26,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:42:26,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:42:26,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:42:26,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:42:26,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:42:26,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:42:26,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:42:26,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:42:26,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:42:26,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:42:26,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:42:26,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:42:26,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:42:26,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:42:26,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:26,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:42:26,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:42:26,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:42:26,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:42:26,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:42:26,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:42:26,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:42:26,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:42:26,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:42:26,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:42:26,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:42:26,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:42:26,615 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:42:26,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 20:42:26,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b7d7a91/bcd764a6824d43a3b661b02a64a5184a/FLAG19290cafd [2020-09-24 20:42:27,249 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:42:27,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 20:42:27,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b7d7a91/bcd764a6824d43a3b661b02a64a5184a/FLAG19290cafd [2020-09-24 20:42:27,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5b7d7a91/bcd764a6824d43a3b661b02a64a5184a [2020-09-24 20:42:27,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:42:27,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:42:27,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:27,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:42:27,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:42:27,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a5289c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27, skipping insertion in model container [2020-09-24 20:42:27,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:27,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:42:27,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:42:27,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:27,898 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:42:27,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:27,945 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:42:27,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27 WrapperNode [2020-09-24 20:42:27,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:27,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:42:27,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:42:27,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:42:28,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... [2020-09-24 20:42:28,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:42:28,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:42:28,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:42:28,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:42:28,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:28,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:42:28,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:42:28,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:42:28,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:42:28,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:42:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:42:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:42:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:42:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:42:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:42:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:42:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:42:28,516 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:42:28,517 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 20:42:28,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:28 BoogieIcfgContainer [2020-09-24 20:42:28,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:42:28,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:42:28,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:42:28,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:42:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:42:27" (1/3) ... [2020-09-24 20:42:28,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b26b801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:28, skipping insertion in model container [2020-09-24 20:42:28,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:27" (2/3) ... [2020-09-24 20:42:28,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b26b801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:28, skipping insertion in model container [2020-09-24 20:42:28,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:28" (3/3) ... [2020-09-24 20:42:28,534 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-09-24 20:42:28,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:42:28,553 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:42:28,573 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:42:28,603 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:42:28,604 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:42:28,604 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:42:28,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:42:28,604 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:42:28,604 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:42:28,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:42:28,605 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:42:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-24 20:42:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 20:42:28,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:28,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:28,639 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1727331883, now seen corresponding path program 1 times [2020-09-24 20:42:28,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:28,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19207949] [2020-09-24 20:42:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 20:42:29,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:29,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-09-24 20:42:29,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:42:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:42:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 20:42:29,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:42:29,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:29,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:29,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:42:29,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:29,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:29,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 20:42:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:29,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:42:29,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:42:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 20:42:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:30,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 20:42:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:42:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:42:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 20:42:30,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19207949] [2020-09-24 20:42:30,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:30,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 20:42:30,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036699848] [2020-09-24 20:42:30,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:42:30,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:42:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:42:30,114 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 9 states. [2020-09-24 20:42:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:30,632 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-09-24 20:42:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:42:30,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 20:42:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:30,649 INFO L225 Difference]: With dead ends: 137 [2020-09-24 20:42:30,649 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 20:42:30,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:42:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 20:42:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-09-24 20:42:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 20:42:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-24 20:42:30,716 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 30 [2020-09-24 20:42:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:30,717 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-24 20:42:30,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:42:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-24 20:42:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 20:42:30,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:30,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:30,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:42:30,721 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1086220015, now seen corresponding path program 1 times [2020-09-24 20:42:30,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:30,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171120054] [2020-09-24 20:42:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:42:30,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 20:42:30,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 20:42:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 20:42:30,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:30,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:30,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:42:30,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 20:42:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:30,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 20:42:30,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:30,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 20:42:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:30,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 20:42:30,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 20:42:30,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171120054] [2020-09-24 20:42:30,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:30,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 20:42:30,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668931621] [2020-09-24 20:42:30,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 20:42:30,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 20:42:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:42:30,964 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2020-09-24 20:42:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:31,105 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-24 20:42:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 20:42:31,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-24 20:42:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:31,108 INFO L225 Difference]: With dead ends: 91 [2020-09-24 20:42:31,108 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 20:42:31,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:42:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 20:42:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-09-24 20:42:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 20:42:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-24 20:42:31,124 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2020-09-24 20:42:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:31,124 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-24 20:42:31,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 20:42:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-24 20:42:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 20:42:31,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:31,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:31,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:42:31,128 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1811286385, now seen corresponding path program 1 times [2020-09-24 20:42:31,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:31,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661277044] [2020-09-24 20:42:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 20:42:36,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:42:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 20:42:36,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 20:42:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 20:42:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 20:42:36,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:36,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:42:36,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:36,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 20:42:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:36,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:36,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 20:42:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 20:42:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:36,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 20:42:36,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:36,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:42:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:36,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 20:42:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:36,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:42:36,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:36,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 20:42:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:36,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:36,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:36,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:42:36,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:36,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:36,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 20:42:36,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661277044] [2020-09-24 20:42:36,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:36,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:42:36,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681099241] [2020-09-24 20:42:36,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:42:36,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:42:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:42:36,622 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 13 states. [2020-09-24 20:42:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:39,683 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-09-24 20:42:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 20:42:39,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-24 20:42:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:39,685 INFO L225 Difference]: With dead ends: 84 [2020-09-24 20:42:39,686 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 20:42:39,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:42:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 20:42:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-09-24 20:42:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 20:42:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-24 20:42:39,697 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-09-24 20:42:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:39,698 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-24 20:42:39,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:42:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-24 20:42:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 20:42:39,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:39,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:39,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:42:39,701 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2082234165, now seen corresponding path program 1 times [2020-09-24 20:42:39,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:39,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847831291] [2020-09-24 20:42:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:42,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:42,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 20:42:42,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2737 [2020-09-24 20:42:42,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:42,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:42,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 20:42:42,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 20:42:42,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:42:43,380 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-09-24 20:42:50,658 WARN L193 SmtUtils]: Spent 7.22 s on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-09-24 20:43:24,815 WARN L193 SmtUtils]: Spent 34.07 s on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2020-09-24 20:43:36,728 WARN L193 SmtUtils]: Spent 11.83 s on a formula simplification. DAG size of input: 256 DAG size of output: 102