/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:13,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:13,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:13,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:13,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:13,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:13,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:13,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:13,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:13,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:13,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:13,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:13,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:13,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:13,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:13,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:13,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:13,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:13,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:13,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:13,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:13,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:13,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:13,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:13,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:13,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:13,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:13,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:13,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:13,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:13,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:13,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:13,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:13,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:13,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:13,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:13,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:13,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:13,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:13,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:13,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:13,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:13,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:13,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:13,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:13,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:13,982 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:13,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:13,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:13,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:13,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:13,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:13,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:13,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:13,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:13,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:13,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:13,984 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:13,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:13,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:13,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:13,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:13,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:13,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:13,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:13,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:13,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:13,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:13,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:13,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:13,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:13,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:14,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:14,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:14,519 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:14,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:14,521 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:14,523 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 09:10:14,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c472d373/f7aa1cff60fe470f9e134a6bab2cfb70/FLAGd6513fae6 [2020-09-25 09:10:15,162 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:15,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 09:10:15,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c472d373/f7aa1cff60fe470f9e134a6bab2cfb70/FLAGd6513fae6 [2020-09-25 09:10:15,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c472d373/f7aa1cff60fe470f9e134a6bab2cfb70 [2020-09-25 09:10:15,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:15,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:15,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:15,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:15,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:15,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15, skipping insertion in model container [2020-09-25 09:10:15,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:15,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:15,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:15,811 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:15,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:15,849 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:15,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15 WrapperNode [2020-09-25 09:10:15,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:15,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:15,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:15,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:15,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... [2020-09-25 09:10:15,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:15,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:15,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:15,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:15,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 09:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:16,254 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:16,255 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:10:16,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:16 BoogieIcfgContainer [2020-09-25 09:10:16,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:16,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:16,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:16,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:16,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:15" (1/3) ... [2020-09-25 09:10:16,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff66c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:16, skipping insertion in model container [2020-09-25 09:10:16,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:15" (2/3) ... [2020-09-25 09:10:16,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff66c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:16, skipping insertion in model container [2020-09-25 09:10:16,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:16" (3/3) ... [2020-09-25 09:10:16,271 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-25 09:10:16,284 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:16,296 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:16,350 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:16,386 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:16,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:16,387 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:16,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:16,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:16,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:16,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:16,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 09:10:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 09:10:16,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:16,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:16,426 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-25 09:10:16,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:16,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305192714] [2020-09-25 09:10:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:16,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:16,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:16,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 09:10:16,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:16,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-25 09:10:16,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:16,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:16,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 09:10:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:16,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:16,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:16,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:16,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:16,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:16,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:16,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:16,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:16,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305192714] [2020-09-25 09:10:16,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:16,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:16,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984280790] [2020-09-25 09:10:16,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:16,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:16,839 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-25 09:10:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:16,866 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-25 09:10:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:16,867 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 09:10:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:16,878 INFO L225 Difference]: With dead ends: 37 [2020-09-25 09:10:16,878 INFO L226 Difference]: Without dead ends: 20 [2020-09-25 09:10:16,882 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 [2020-09-25 09:10:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-25 09:10:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-25 09:10:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 09:10:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-25 09:10:16,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-25 09:10:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:16,926 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-25 09:10:16,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-25 09:10:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 09:10:16,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:16,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:16,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:16,928 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-25 09:10:16,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:16,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528449356] [2020-09-25 09:10:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:17,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 09:10:17,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:17,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 09:10:17,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:17,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:17,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:10:17,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:17,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:17,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:17,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:17,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:17,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:17,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:17,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:17,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:17,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:17,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:17,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:17,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528449356] [2020-09-25 09:10:17,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:17,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:17,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959243662] [2020-09-25 09:10:17,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:17,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:17,184 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-25 09:10:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:17,238 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-25 09:10:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:10:17,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 09:10:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:17,240 INFO L225 Difference]: With dead ends: 31 [2020-09-25 09:10:17,241 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 09:10:17,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 09:10:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-25 09:10:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 09:10:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 09:10:17,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 09:10:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:17,253 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 09:10:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 09:10:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 09:10:17,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:17,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:17,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:17,257 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-25 09:10:17,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:17,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446944275] [2020-09-25 09:10:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:17,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 09:10:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-25 09:10:17,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:17,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:10:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:17,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:17,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:17,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:17,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:17,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:17,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:17,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:17,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:17,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446944275] [2020-09-25 09:10:17,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:10:17,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504777874] [2020-09-25 09:10:17,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:10:17,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:10:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:17,835 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-25 09:10:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:18,119 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-25 09:10:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:10:18,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 09:10:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:18,122 INFO L225 Difference]: With dead ends: 48 [2020-09-25 09:10:18,123 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 09:10:18,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 09:10:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 09:10:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 09:10:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 09:10:18,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-25 09:10:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:18,134 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 09:10:18,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:10:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 09:10:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 09:10:18,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:18,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:18,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:18,137 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-25 09:10:18,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:18,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027401981] [2020-09-25 09:10:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:18,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:18,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:18,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:10:18,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 09:10:18,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:18,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 09:10:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:18,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:18,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:18,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:18,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:18,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:18,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:18,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:18,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:18,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027401981] [2020-09-25 09:10:18,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:18,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:10:18,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513120262] [2020-09-25 09:10:18,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:18,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:18,296 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 09:10:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:18,351 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-25 09:10:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:10:18,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 09:10:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:18,353 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:10:18,353 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:10:18,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:10:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 09:10:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 09:10:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 09:10:18,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-25 09:10:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:18,361 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 09:10:18,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 09:10:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 09:10:18,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:18,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:18,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:18,363 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:18,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-25 09:10:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:18,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12822426] [2020-09-25 09:10:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:18,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:18,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 09:10:18,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-09-25 09:10:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:18,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 09:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:10:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:18,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:18,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:18,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:18,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:18,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:18,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:18,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:18,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:18,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:18,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12822426] [2020-09-25 09:10:18,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:18,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 09:10:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137866551] [2020-09-25 09:10:18,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 09:10:18,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 09:10:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 09:10:18,905 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 09:10:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:19,413 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 09:10:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 09:10:19,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 09:10:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:19,414 INFO L225 Difference]: With dead ends: 42 [2020-09-25 09:10:19,415 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 09:10:19,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 09:10:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-25 09:10:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 09:10:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 09:10:19,429 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-25 09:10:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:19,430 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 09:10:19,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 09:10:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 09:10:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 09:10:19,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:19,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:19,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:19,434 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-25 09:10:19,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:19,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247909640] [2020-09-25 09:10:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:19,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:19,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:10:19,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 09:10:19,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:19,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:19,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:19,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:10:19,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:19,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:19,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:19,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:19,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:19,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:19,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:19,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:19,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:19,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247909640] [2020-09-25 09:10:19,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:19,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:10:19,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522077955] [2020-09-25 09:10:19,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:10:19,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:19,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:10:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:19,638 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 09:10:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:19,720 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 09:10:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:10:19,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-25 09:10:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:19,724 INFO L225 Difference]: With dead ends: 48 [2020-09-25 09:10:19,724 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 09:10:19,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 09:10:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 09:10:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 09:10:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 09:10:19,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-25 09:10:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:19,734 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 09:10:19,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:10:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 09:10:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 09:10:19,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:19,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:19,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:10:19,740 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-25 09:10:19,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:19,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487300926] [2020-09-25 09:10:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:19,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 09:10:20,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-25 09:10:20,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 09:10:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 09:10:20,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:20,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:20,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:20,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:20,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 09:10:20,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487300926] [2020-09-25 09:10:20,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:20,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:10:20,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249129647] [2020-09-25 09:10:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:10:20,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:10:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:10:20,453 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 09:10:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:20,785 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-25 09:10:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:10:20,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 09:10:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:20,786 INFO L225 Difference]: With dead ends: 47 [2020-09-25 09:10:20,786 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 09:10:20,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 09:10:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 09:10:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 09:10:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 09:10:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 09:10:20,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-25 09:10:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:20,800 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 09:10:20,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:10:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 09:10:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:10:20,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:20,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:20,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:10:20,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-25 09:10:20,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:20,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257700986] [2020-09-25 09:10:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 09:10:21,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-09-25 09:10:21,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 09:10:21,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:21,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:21,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:21,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:21,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257700986] [2020-09-25 09:10:21,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:21,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:10:21,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231122442] [2020-09-25 09:10:21,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:10:21,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:10:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:21,072 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-25 09:10:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:21,174 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 09:10:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:10:21,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-25 09:10:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:21,175 INFO L225 Difference]: With dead ends: 60 [2020-09-25 09:10:21,176 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 09:10:21,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 09:10:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 09:10:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 09:10:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-25 09:10:21,190 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-25 09:10:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:21,190 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-25 09:10:21,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:10:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-25 09:10:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 09:10:21,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:21,195 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:21,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:10:21,195 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-25 09:10:21,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:21,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436279477] [2020-09-25 09:10:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 09:10:21,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-25 09:10:21,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:10:21,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:21,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 09:10:21,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:21,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:21,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:21,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:21,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436279477] [2020-09-25 09:10:21,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:21,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:10:21,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953048050] [2020-09-25 09:10:21,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:10:21,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:21,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:10:21,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:21,559 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-25 09:10:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:21,689 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 09:10:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:10:21,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-25 09:10:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:21,690 INFO L225 Difference]: With dead ends: 66 [2020-09-25 09:10:21,690 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 09:10:21,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:10:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 09:10:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 09:10:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 09:10:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 09:10:21,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-25 09:10:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:21,697 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 09:10:21,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:10:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 09:10:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 09:10:21,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:21,699 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:21,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:10:21,699 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-25 09:10:21,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:21,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212670422] [2020-09-25 09:10:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 09:10:21,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-09-25 09:10:21,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:10:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 09:10:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:22,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:22,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:22,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:22,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212670422] [2020-09-25 09:10:22,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:22,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:10:22,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407803558] [2020-09-25 09:10:22,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:10:22,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:10:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:10:22,092 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-25 09:10:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:22,259 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-25 09:10:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 09:10:22,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-25 09:10:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:22,261 INFO L225 Difference]: With dead ends: 72 [2020-09-25 09:10:22,261 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 09:10:22,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 09:10:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-25 09:10:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 09:10:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 09:10:22,268 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-25 09:10:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:22,268 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 09:10:22,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:10:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 09:10:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 09:10:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:22,270 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:22,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:10:22,270 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-25 09:10:22,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:22,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657000912] [2020-09-25 09:10:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:10:22,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:22,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:22,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:22,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657000912] [2020-09-25 09:10:22,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:22,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:10:22,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933584824] [2020-09-25 09:10:22,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:10:22,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:10:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:22,823 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-25 09:10:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:23,056 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-25 09:10:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 09:10:23,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-25 09:10:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:23,058 INFO L225 Difference]: With dead ends: 78 [2020-09-25 09:10:23,058 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 09:10:23,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 09:10:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 09:10:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 09:10:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 09:10:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 09:10:23,065 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-25 09:10:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:23,065 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 09:10:23,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:10:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 09:10:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 09:10:23,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:23,067 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:23,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 09:10:23,067 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-25 09:10:23,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:23,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274015944] [2020-09-25 09:10:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 09:10:23,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-09-25 09:10:23,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 09:10:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 09:10:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:23,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:23,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:23,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:23,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274015944] [2020-09-25 09:10:23,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:23,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 09:10:23,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890074440] [2020-09-25 09:10:23,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 09:10:23,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 09:10:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 09:10:23,718 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-25 09:10:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:24,003 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-25 09:10:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 09:10:24,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-25 09:10:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:24,005 INFO L225 Difference]: With dead ends: 84 [2020-09-25 09:10:24,005 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 09:10:24,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 09:10:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 09:10:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-25 09:10:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 09:10:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 09:10:24,022 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 09:10:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:24,022 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 09:10:24,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 09:10:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 09:10:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 09:10:24,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:24,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:24,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 09:10:24,026 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-25 09:10:24,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:24,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788395373] [2020-09-25 09:10:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 09:10:24,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-09-25 09:10:24,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 09:10:24,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:10:24,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 09:10:24,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:25,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:25,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:25,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:25,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788395373] [2020-09-25 09:10:25,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:25,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 09:10:25,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150693534] [2020-09-25 09:10:25,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 09:10:25,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 09:10:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:10:25,091 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-25 09:10:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:25,514 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 09:10:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 09:10:25,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-25 09:10:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:25,516 INFO L225 Difference]: With dead ends: 89 [2020-09-25 09:10:25,516 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 09:10:25,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 09:10:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 09:10:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 09:10:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 09:10:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 09:10:25,527 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 09:10:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:25,527 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 09:10:25,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 09:10:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 09:10:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 09:10:25,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:25,529 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:25,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 09:10:25,530 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-25 09:10:25,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:25,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381148842] [2020-09-25 09:10:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:10:25,550 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:10:25,551 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:10:25,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 09:10:25,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:25 BoogieIcfgContainer [2020-09-25 09:10:25,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:10:25,590 INFO L168 Benchmark]: Toolchain (without parser) took 10088.51 ms. Allocated memory was 140.0 MB in the beginning and 302.5 MB in the end (delta: 162.5 MB). Free memory was 103.8 MB in the beginning and 229.3 MB in the end (delta: -125.5 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:25,591 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 09:10:25,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.70 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:25,593 INFO L168 Benchmark]: Boogie Preprocessor took 113.52 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:25,599 INFO L168 Benchmark]: RCFGBuilder took 296.73 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:25,604 INFO L168 Benchmark]: TraceAbstraction took 9324.06 ms. Allocated memory was 202.9 MB in the beginning and 302.5 MB in the end (delta: 99.6 MB). Free memory was 169.8 MB in the beginning and 229.3 MB in the end (delta: -59.5 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:25,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.70 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.52 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.73 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9324.06 ms. Allocated memory was 202.9 MB in the beginning and 302.5 MB in the end (delta: 99.6 MB). Free memory was 169.8 MB in the beginning and 229.3 MB in the end (delta: -59.5 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 201 SDslu, 1069 SDs, 0 SdLazy, 775 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 60623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 160/758 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 incorrect! Received shutdown request...