/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:13:10,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:13:10,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:13:10,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:13:10,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:13:10,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:13:10,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:13:10,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:13:10,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:13:10,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:13:10,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:13:10,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:13:10,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:13:10,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:13:10,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:13:10,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:13:10,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:13:10,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:13:10,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:13:10,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:13:10,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:13:10,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:13:10,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:13:10,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:13:10,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:13:10,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:13:10,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:13:10,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:13:10,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:13:10,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:13:10,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:13:10,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:13:10,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:13:10,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:13:10,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:13:10,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:13:10,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:13:10,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:13:10,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:13:10,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:13:10,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:13:10,897 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 [2020-10-14 05:13:10,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:13:10,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:13:10,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:13:10,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:13:10,940 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:13:10,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:13:10,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:13:10,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:13:10,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:13:10,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:13:10,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:13:10,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:13:10,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:13:10,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:13:10,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:13:10,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:13:10,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:13:10,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:13:10,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:13:10,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:13:10,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:13:10,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:13:10,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:13:10,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:13:10,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:13:10,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:13:10,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:13:10,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:13:10,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:13:10,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:13:11,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:13:11,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:13:11,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:13:11,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:13:11,323 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:13:11,324 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-14 05:13:11,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5a97c710/21165d95b83944c59cc1804be4428341/FLAG9906b8096 [2020-10-14 05:13:11,850 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:13:11,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-14 05:13:11,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5a97c710/21165d95b83944c59cc1804be4428341/FLAG9906b8096 [2020-10-14 05:13:12,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5a97c710/21165d95b83944c59cc1804be4428341 [2020-10-14 05:13:12,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:13:12,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:13:12,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:12,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:13:12,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:13:12,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12, skipping insertion in model container [2020-10-14 05:13:12,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:13:12,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:13:12,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:12,539 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:13:12,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:12,582 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:13:12,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12 WrapperNode [2020-10-14 05:13:12,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:12,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:13:12,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:13:12,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:13:12,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (1/1) ... [2020-10-14 05:13:12,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:13:12,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:13:12,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:13:12,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:13:12,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (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 [2020-10-14 05:13:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:13:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:13:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:13:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:13:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:13:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:13:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:13:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:13:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:13:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:13:12,961 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:13:12,962 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:13:12,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:12 BoogieIcfgContainer [2020-10-14 05:13:12,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:13:12,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:13:12,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:13:12,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:13:12,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:13:12" (1/3) ... [2020-10-14 05:13:12,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d78f96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:12, skipping insertion in model container [2020-10-14 05:13:12,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:12" (2/3) ... [2020-10-14 05:13:12,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d78f96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:12, skipping insertion in model container [2020-10-14 05:13:12,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:12" (3/3) ... [2020-10-14 05:13:12,975 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2020-10-14 05:13:12,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:13:12,994 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:13:13,009 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:13:13,035 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:13:13,036 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:13:13,036 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:13:13,036 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:13:13,036 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:13:13,037 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:13:13,037 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:13:13,037 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:13:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 05:13:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:13:13,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:13,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:13,065 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 05:13:13,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:13,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910399163] [2020-10-14 05:13:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:13:13,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-14 05:13:13,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:13:13,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:13,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:13,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910399163] [2020-10-14 05:13:13,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:13,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:13:13,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33536097] [2020-10-14 05:13:13,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:13:13,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:13:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:13:13,313 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 05:13:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:13,338 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:13:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:13:13,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:13:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:13,348 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:13:13,349 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:13:13,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:13:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:13:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:13:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:13:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:13:13,386 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:13:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:13,387 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:13:13,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:13:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:13:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:13:13,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:13,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:13,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:13:13,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:13,390 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 05:13:13,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:13,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002955752] [2020-10-14 05:13:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:13:13,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-14 05:13:13,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:13:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:13,857 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-10-14 05:13:13,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:13,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:13,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:13,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002955752] [2020-10-14 05:13:13,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:13,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:13,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040404996] [2020-10-14 05:13:13,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:13,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:13,872 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:13:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:13,895 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-14 05:13:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:13,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:13:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:13,899 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:13:13,899 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:13:13,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:13:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-14 05:13:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:13:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-14 05:13:13,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-14 05:13:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:13,907 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-14 05:13:13,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-14 05:13:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:13:13,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:13,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:13,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:13:13,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:13,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 05:13:13,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:13,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425545844] [2020-10-14 05:13:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:13:14,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:14,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-14 05:13:14,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:13:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:13:14,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:14,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:14,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:14,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:14,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425545844] [2020-10-14 05:13:14,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:14,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:13:14,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373077295] [2020-10-14 05:13:14,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:13:14,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:13:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:14,369 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-14 05:13:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:14,409 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-14 05:13:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:13:14,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 05:13:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:14,411 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:13:14,411 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:13:14,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:13:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:13:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:13:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-14 05:13:14,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-14 05:13:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:14,418 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-14 05:13:14,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:13:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-14 05:13:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:14,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:14,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:14,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:13:14,420 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2020-10-14 05:13:14,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:14,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118076056] [2020-10-14 05:13:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:14,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:14,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:13:14,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:13:14,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:14,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:14,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:14,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118076056] [2020-10-14 05:13:14,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:14,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:14,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502675572] [2020-10-14 05:13:14,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:14,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:14,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:14,643 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-14 05:13:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:14,688 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-14 05:13:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:14,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 05:13:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:14,690 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:13:14,690 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:13:14,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:13:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 05:13:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:13:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-14 05:13:14,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-14 05:13:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:14,696 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-14 05:13:14,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-14 05:13:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:14,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:14,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:14,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:13:14,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -976494032, now seen corresponding path program 1 times [2020-10-14 05:13:14,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:14,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008198507] [2020-10-14 05:13:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:14,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-14 05:13:14,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:13:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:13:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:18,739 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 60 DAG size of output: 12 [2020-10-14 05:13:18,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:18,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:18,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:18,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:18,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:18,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:18,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:18,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:18,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:18,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008198507] [2020-10-14 05:13:18,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:18,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:18,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394698428] [2020-10-14 05:13:18,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:18,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:18,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:18,753 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-10-14 05:13:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:18,785 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-14 05:13:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:18,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:13:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:18,789 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:13:18,789 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:13:18,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:13:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-14 05:13:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:13:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-14 05:13:18,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2020-10-14 05:13:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:18,808 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-14 05:13:18,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-14 05:13:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:18,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:18,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:18,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:13:18,811 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -919235730, now seen corresponding path program 1 times [2020-10-14 05:13:18,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:18,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347901958] [2020-10-14 05:13:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:19,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:19,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-14 05:13:19,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:13:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-14 05:13:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:19,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:19,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:19,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347901958] [2020-10-14 05:13:19,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:19,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338275626] [2020-10-14 05:13:19,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:19,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:19,437 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-10-14 05:13:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:19,502 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:13:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:19,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 05:13:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:19,505 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:13:19,505 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:13:19,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:13:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-14 05:13:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:13:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-14 05:13:19,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-10-14 05:13:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:19,521 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-14 05:13:19,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-14 05:13:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:19,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:19,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:19,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:13:19,525 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2020-10-14 05:13:19,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:19,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097349818] [2020-10-14 05:13:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:19,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-14 05:13:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:13:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:30,531 WARN L193 SmtUtils]: Spent 8.56 s on a formula simplification. DAG size of input: 107 DAG size of output: 24 [2020-10-14 05:13:30,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:30,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:30,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097349818] [2020-10-14 05:13:30,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:30,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:30,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103878864] [2020-10-14 05:13:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:30,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2020-10-14 05:13:30,580 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-14 05:13:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:30,745 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-14 05:13:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:30,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 05:13:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:30,746 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:13:30,747 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:13:30,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2020-10-14 05:13:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:13:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:13:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:13:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:13:30,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-10-14 05:13:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:30,754 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:13:30,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:13:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:30,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:30,755 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:30,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:13:30,755 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1784650519, now seen corresponding path program 2 times [2020-10-14 05:13:30,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:30,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484209776] [2020-10-14 05:13:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:30,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:31,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:31,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:31,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:31,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 05:13:31,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:31,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:13:31,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:33,345 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (div c_main_~y~0 2))) (let ((.cse1 (* 2 .cse13))) (let ((.cse0 (= c_main_~y~0 .cse1)) (.cse11 (* 4294967296 (div c_main_~y~0 4294967296)))) (and (or .cse0 (and (< .cse1 c_main_~y~0) (<= 1 c_main_~x~0) (<= c_main_~y~0 (+ .cse1 1)) (<= (+ (* 2 (div c_main_~x~0 2)) 1) c_main_~x~0) (<= c_main_~x~0 1))) (let ((.cse2 (not .cse0))) (or .cse2 (let ((.cse12 (* .cse13 (- 2)))) (let ((.cse9 (< c_main_~y~0 .cse11)) (.cse8 (div (+ c_main_~y~0 .cse12) 4294967296)) (.cse5 (div (+ c_main_~y~0 .cse12 (- 2)) 4294967296)) (.cse6 (<= .cse11 c_main_~y~0))) (let ((.cse4 (or .cse0 .cse6)) (.cse10 (+ .cse5 1)) (.cse3 (+ .cse8 1)) (.cse7 (and .cse9 .cse2))) (and (or (and (<= .cse3 0) .cse4) (and (or .cse0 (< (+ .cse1 (* 4294967296 .cse5) 2) c_main_~y~0) .cse6) (or .cse7 .cse0 .cse6) (or .cse7 (< (+ (* 4294967296 .cse8) .cse1) c_main_~y~0))) (and .cse9 .cse2 (<= .cse10 0))) (or (and .cse9 (<= 0 .cse5) .cse2) (and .cse4 (<= 0 .cse8)) (and (or (< 0 .cse10) .cse0 .cse6) (or (< 0 .cse3) .cse7))))))))) (< .cse11 (+ c_main_~y~0 1)))))) is different from false [2020-10-14 05:13:33,827 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 18 [2020-10-14 05:13:33,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:33,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:33,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:33,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2020-10-14 05:13:33,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484209776] [2020-10-14 05:13:33,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:33,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:33,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994374697] [2020-10-14 05:13:33,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:33,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2020-10-14 05:13:33,864 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-10-14 05:13:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:34,101 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-14 05:13:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:34,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 05:13:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:34,105 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:13:34,105 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:13:34,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-10-14 05:13:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:13:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 05:13:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:13:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-14 05:13:34,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-14 05:13:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:34,121 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-14 05:13:34,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-14 05:13:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:13:34,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:34,122 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:34,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:13:34,123 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:34,123 INFO L82 PathProgramCache]: Analyzing trace with hash 719600874, now seen corresponding path program 2 times [2020-10-14 05:13:34,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:34,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607275486] [2020-10-14 05:13:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:34,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:13:34,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:13:34,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-14 05:13:34,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:34,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:13:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:13:34,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:38,637 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 61 DAG size of output: 12 [2020-10-14 05:13:38,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:38,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:38,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:38,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:38,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:38,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:13:38,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607275486] [2020-10-14 05:13:38,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:38,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:38,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716997443] [2020-10-14 05:13:38,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:38,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:38,647 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 3 states. [2020-10-14 05:13:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:38,680 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-14 05:13:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:38,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:13:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:38,681 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:13:38,682 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:13:38,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:13:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:13:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:13:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 05:13:38,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-10-14 05:13:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:38,687 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 05:13:38,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 05:13:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:13:38,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:38,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:38,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:13:38,689 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -224607324, now seen corresponding path program 3 times [2020-10-14 05:13:38,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:38,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781888634] [2020-10-14 05:13:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:39,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:13:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:39,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 05:13:39,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:39,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:13:39,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:39,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:13:39,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:39,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:39,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:39,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:39,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:39,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:39,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:39,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:39,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:39,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:39,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:39,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:39,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781888634] [2020-10-14 05:13:39,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:39,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:13:39,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408802017] [2020-10-14 05:13:39,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:39,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:39,206 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-14 05:13:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:39,279 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-14 05:13:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:13:39,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:13:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:39,282 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:13:39,282 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:13:39,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:13:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:13:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:13:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 05:13:39,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-14 05:13:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:39,291 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 05:13:39,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 05:13:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:13:39,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:39,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:39,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:13:39,292 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 33316767, now seen corresponding path program 4 times [2020-10-14 05:13:39,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:39,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998055666] [2020-10-14 05:13:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:39,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:40,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:40,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:13:40,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-14 05:13:40,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:40,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:40,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:40,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:13:40,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:40,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:40,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:40,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:40,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:40,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:40,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:40,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:40,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:40,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:40,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998055666] [2020-10-14 05:13:40,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:40,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:40,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678216181] [2020-10-14 05:13:40,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:40,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:40,237 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-14 05:13:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:40,322 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-14 05:13:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:40,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:13:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:40,324 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:13:40,324 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:13:40,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:13:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 05:13:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:13:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 05:13:40,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-14 05:13:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:40,333 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 05:13:40,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 05:13:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:13:40,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:40,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:40,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:13:40,336 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1209734950, now seen corresponding path program 5 times [2020-10-14 05:13:40,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:40,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839456911] [2020-10-14 05:13:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:40,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:40,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:40,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:13:40,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:40,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 05:13:40,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:40,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:40,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:13:40,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:40,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:13:40,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:40,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:41,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:41,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:41,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:41,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:41,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:41,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:41,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839456911] [2020-10-14 05:13:41,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:41,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:13:41,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541558456] [2020-10-14 05:13:41,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:13:41,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:13:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:41,009 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-14 05:13:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:41,105 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-14 05:13:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:13:41,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 05:13:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:41,106 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:13:41,106 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:13:41,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:13:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 05:13:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:13:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 05:13:41,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-14 05:13:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:41,112 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 05:13:41,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:13:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 05:13:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:13:41,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:41,113 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:41,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:13:41,114 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:41,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1781526699, now seen corresponding path program 6 times [2020-10-14 05:13:41,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:41,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031934012] [2020-10-14 05:13:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:42,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:42,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:13:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:13:42,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:13:42,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:42,604 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 20 [2020-10-14 05:13:57,383 WARN L193 SmtUtils]: Spent 12.66 s on a formula simplification. DAG size of input: 164 DAG size of output: 25 [2020-10-14 05:13:59,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:59,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:59,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:13:59,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031934012] [2020-10-14 05:13:59,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:59,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:13:59,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991846808] [2020-10-14 05:13:59,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:59,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:59,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=28, Unknown=2, NotChecked=0, Total=42 [2020-10-14 05:13:59,473 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 7 states. [2020-10-14 05:13:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:59,581 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-14 05:13:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:59,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:13:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:59,581 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:13:59,581 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:13:59,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2020-10-14 05:13:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:13:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:13:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:13:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:13:59,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-14 05:13:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:59,583 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:13:59,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:13:59,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:13:59,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:13:59,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:14:01,741 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2020-10-14 05:14:05,956 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-14 05:14:05,960 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:14:05,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:14:05,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:14:05,961 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:14:05,961 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:14:05,961 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:14:05,961 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 24) the Hoare annotation is: true [2020-10-14 05:14:05,961 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 24) no Hoare annotation was computed. [2020-10-14 05:14:05,961 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-10-14 05:14:05,962 INFO L264 CegarLoopResult]: At program point L16-2(lines 15 21) the Hoare annotation is: (let ((.cse4 (div main_~y~0 2))) (let ((.cse0 (* 4294967296 (div (+ main_~y~0 (* .cse4 (- 2))) 4294967296))) (.cse2 (* 2 .cse4))) (let ((.cse1 (+ .cse0 .cse2))) (or (and (<= (+ main_~x~0 .cse0) (+ (* 4294967296 (div main_~x~0 4294967296)) 99)) (< .cse1 main_~y~0)) (and (<= main_~y~0 .cse1) (<= (+ main_~x~0 .cse0 .cse2) (let ((.cse3 (div main_~x~0 2))) (+ (* 2 .cse3) (* 4294967296 (div (+ (* .cse3 (- 2)) main_~x~0) 4294967296)) main_~y~0)))))))) [2020-10-14 05:14:05,962 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 21) the Hoare annotation is: (let ((.cse4 (div main_~y~0 2))) (let ((.cse1 (* 4294967296 (div (+ main_~y~0 (* .cse4 (- 2))) 4294967296))) (.cse2 (* 2 .cse4)) (.cse0 (let ((.cse3 (div main_~x~0 2))) (+ (* 2 .cse3) (* 4294967296 (div (+ (* .cse3 (- 2)) main_~x~0) 4294967296)) main_~y~0)))) (and (< .cse0 (+ main_~x~0 .cse1 .cse2 1)) (<= (+ main_~x~0 .cse1 .cse2) .cse0)))) [2020-10-14 05:14:05,962 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 24) no Hoare annotation was computed. [2020-10-14 05:14:05,962 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-10-14 05:14:05,962 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-10-14 05:14:05,962 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-10-14 05:14:05,963 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-10-14 05:14:05,963 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-10-14 05:14:05,963 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-10-14 05:14:05,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:14:05 BoogieIcfgContainer [2020-10-14 05:14:05,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:14:05,991 INFO L168 Benchmark]: Toolchain (without parser) took 53739.18 ms. Allocated memory was 146.8 MB in the beginning and 331.9 MB in the end (delta: 185.1 MB). Free memory was 102.0 MB in the beginning and 235.0 MB in the end (delta: -133.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-10-14 05:14:05,992 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 05:14:05,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.77 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:14:05,994 INFO L168 Benchmark]: Boogie Preprocessor took 131.16 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.0 MB in the beginning and 180.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:14:05,995 INFO L168 Benchmark]: RCFGBuilder took 249.99 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 169.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:14:05,996 INFO L168 Benchmark]: TraceAbstraction took 53021.97 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 168.2 MB in the beginning and 235.0 MB in the end (delta: -66.8 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:14:06,004 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 330.77 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.16 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.0 MB in the beginning and 180.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.99 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 169.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 53021.97 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 168.2 MB in the beginning and 235.0 MB in the end (delta: -66.8 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (x + 4294967296 * ((y + y / 2 * -2) / 4294967296) <= 4294967296 * (x / 4294967296) + 99 && 4294967296 * ((y + y / 2 * -2) / 4294967296) + 2 * (y / 2) < y) || (y <= 4294967296 * ((y + y / 2 * -2) / 4294967296) + 2 * (y / 2) && x + 4294967296 * ((y + y / 2 * -2) / 4294967296) + 2 * (y / 2) <= 2 * (x / 2) + 4294967296 * ((x / 2 * -2 + x) / 4294967296) + y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46.5s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 36 SDslu, 342 SDs, 0 SdLazy, 405 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 11 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 20 PreInvPairs, 34 NumberOfFragments, 180 HoareAnnotationTreeSize, 20 FomulaSimplifications, 553 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 195 FormulaSimplificationTreeSizeReductionInter, 6.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 44.9s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 28471 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 69/173 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...