/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:21:14,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:21:14,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:21:14,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:21:14,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:21:14,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:21:14,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:21:14,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:21:14,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:21:14,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:21:14,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:21:14,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:21:14,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:21:14,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:21:14,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:21:14,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:21:14,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:21:14,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:21:14,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:21:14,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:21:14,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:21:14,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:21:14,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:21:14,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:21:14,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:21:14,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:21:14,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:21:14,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:21:14,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:21:14,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:21:14,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:21:14,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:21:14,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:21:14,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:21:14,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:21:14,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:21:14,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:21:14,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:21:14,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:21:14,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:21:14,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:21:14,885 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 13:21:14,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:21:14,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:21:14,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:21:14,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:21:14,913 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:21:14,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:21:14,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:21:14,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:21:14,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:21:14,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:21:14,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:21:14,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:21:14,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:21:14,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:21:14,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:21:14,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:21:14,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:21:14,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:21:14,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:21:14,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:21:14,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:21:14,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:21:14,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:21:14,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:21:14,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:21:14,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:21:14,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:21:14,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:21:14,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:21:14,918 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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:21:15,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:21:15,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:21:15,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:21:15,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:21:15,518 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:21:15,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 13:21:15,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f5e89751/0cbe37189b8749c7af80f8eedbbe01bf/FLAG9645fbcca [2020-09-25 13:21:16,125 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:21:16,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 13:21:16,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f5e89751/0cbe37189b8749c7af80f8eedbbe01bf/FLAG9645fbcca [2020-09-25 13:21:16,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f5e89751/0cbe37189b8749c7af80f8eedbbe01bf [2020-09-25 13:21:16,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:21:16,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:21:16,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:21:16,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:21:16,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:21:16,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16, skipping insertion in model container [2020-09-25 13:21:16,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:21:16,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:21:16,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:21:16,792 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:21:16,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:21:16,830 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:21:16,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16 WrapperNode [2020-09-25 13:21:16,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:21:16,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:21:16,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:21:16,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:21:16,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (1/1) ... [2020-09-25 13:21:16,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:21:16,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:21:16,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:21:16,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:21:16,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (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 13:21:17,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:21:17,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:21:17,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:21:17,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:21:17,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:21:17,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 13:21:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:21:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:21:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:21:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:21:17,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:21:17,338 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:21:17,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:21:17 BoogieIcfgContainer [2020-09-25 13:21:17,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:21:17,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:21:17,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:21:17,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:21:17,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:21:16" (1/3) ... [2020-09-25 13:21:17,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41000135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:21:17, skipping insertion in model container [2020-09-25 13:21:17,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:21:16" (2/3) ... [2020-09-25 13:21:17,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41000135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:21:17, skipping insertion in model container [2020-09-25 13:21:17,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:21:17" (3/3) ... [2020-09-25 13:21:17,354 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-25 13:21:17,366 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:21:17,376 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:21:17,399 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:21:17,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:21:17,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:21:17,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:21:17,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:21:17,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:21:17,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:21:17,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:21:17,432 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:21:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-25 13:21:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 13:21:17,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:21:17,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:21:17,464 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:21:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:21:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-25 13:21:17,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:21:17,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426861666] [2020-09-25 13:21:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:21:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:17,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:17,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 13:21:17,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:21:17,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 13:21:17,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:17,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:21:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 13:21:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:21:17,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:21:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:21:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:17,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:17,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:21:17,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:21:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:21:17,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:17,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:21:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:21:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:21:17,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:21:17,741 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 13:21:17,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426861666] [2020-09-25 13:21:17,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:21:17,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 13:21:17,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359836517] [2020-09-25 13:21:17,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 13:21:17,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:21:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 13:21:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 13:21:17,767 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-25 13:21:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:21:17,795 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-25 13:21:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 13:21:17,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 13:21:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:21:17,808 INFO L225 Difference]: With dead ends: 62 [2020-09-25 13:21:17,808 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 13:21:17,812 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 13:21:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 13:21:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-25 13:21:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 13:21:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-25 13:21:17,860 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-25 13:21:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:21:17,861 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-25 13:21:17,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 13:21:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-25 13:21:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 13:21:17,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:21:17,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:21:17,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:21:17,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:21:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:21:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-25 13:21:17,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:21:17,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945197805] [2020-09-25 13:21:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:21:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:17,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:17,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 13:21:17,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:21:17,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 13:21:17,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:17,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:21:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:21:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 13:21:17,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:21:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:21:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:18,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:21:18,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:21:18,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 13:21:18,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:18,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:21:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:21:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:21:18,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:21:18,113 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 13:21:18,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945197805] [2020-09-25 13:21:18,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:21:18,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 13:21:18,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156643364] [2020-09-25 13:21:18,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 13:21:18,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:21:18,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 13:21:18,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 13:21:18,123 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-25 13:21:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:21:18,223 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-25 13:21:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 13:21:18,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 13:21:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:21:18,226 INFO L225 Difference]: With dead ends: 55 [2020-09-25 13:21:18,227 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 13:21:18,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 13:21:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 13:21:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-25 13:21:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 13:21:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-25 13:21:18,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-25 13:21:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:21:18,244 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-25 13:21:18,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 13:21:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-25 13:21:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 13:21:18,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:21:18,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:21:18,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:21:18,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:21:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:21:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-25 13:21:18,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:21:18,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915484631] [2020-09-25 13:21:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:21:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:18,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:19,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 13:21:19,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 13:21:19,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-09-25 13:21:19,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:19,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:21:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 13:21:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 13:21:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:21:19,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:21:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:21:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:21:19,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:21:19,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:21:19,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:21:19,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:21:19,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:21:19,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:21:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:21:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:21:19,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915484631] [2020-09-25 13:21:19,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:21:19,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 13:21:19,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103759681] [2020-09-25 13:21:19,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 13:21:19,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:21:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 13:21:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 13:21:19,963 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-09-25 13:21:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:21:20,112 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-09-25 13:21:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 13:21:20,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-25 13:21:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:21:20,118 INFO L225 Difference]: With dead ends: 96 [2020-09-25 13:21:20,118 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 13:21:20,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 13:21:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 13:21:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 13:21:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 13:21:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-09-25 13:21:20,132 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-09-25 13:21:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:21:20,132 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-09-25 13:21:20,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 13:21:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-09-25 13:21:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 13:21:20,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:21:20,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:21:20,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:21:20,135 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:21:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:21:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-25 13:21:20,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:21:20,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178011397] [2020-09-25 13:21:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:21:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:21:20,173 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:21:20,174 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:21:20,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:21:20,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:21:20 BoogieIcfgContainer [2020-09-25 13:21:20,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:21:20,208 INFO L168 Benchmark]: Toolchain (without parser) took 3718.85 ms. Allocated memory was 138.9 MB in the beginning and 246.9 MB in the end (delta: 108.0 MB). Free memory was 102.4 MB in the beginning and 215.9 MB in the end (delta: -113.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:21:20,213 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:21:20,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.01 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:21:20,216 INFO L168 Benchmark]: Boogie Preprocessor took 118.25 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 179.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:21:20,218 INFO L168 Benchmark]: RCFGBuilder took 394.19 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 162.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-09-25 13:21:20,225 INFO L168 Benchmark]: TraceAbstraction took 2858.92 ms. Allocated memory was 201.3 MB in the beginning and 246.9 MB in the end (delta: 45.6 MB). Free memory was 162.0 MB in the beginning and 215.9 MB in the end (delta: -53.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:21:20,229 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.01 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.25 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 179.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.19 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 162.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2858.92 ms. Allocated memory was 201.3 MB in the beginning and 246.9 MB in the end (delta: 45.6 MB). Free memory was 162.0 MB in the beginning and 215.9 MB in the end (delta: -53.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 24 SDslu, 53 SDs, 0 SdLazy, 47 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 12408 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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...