/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:42:22,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:42:22,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:42:22,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:42:22,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:42:22,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:42:22,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:42:22,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:42:22,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:42:22,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:42:22,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:42:22,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:42:22,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:42:22,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:42:22,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:42:22,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:42:22,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:42:22,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:42:22,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:42:22,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:42:22,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:42:22,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:42:22,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:42:22,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:42:22,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:42:22,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:42:22,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:42:22,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:42:22,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:42:22,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:42:22,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:42:22,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:42:22,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:42:22,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:42:22,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:42:22,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:42:22,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:42:22,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:42:22,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:42:22,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:42:22,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:42:22,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:42:22,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:42:22,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:42:22,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:42:22,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:42:22,715 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:42:22,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:42:22,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:42:22,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:42:22,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:42:22,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:42:22,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:42:22,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:42:22,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:42:22,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:42:22,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:42:22,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:42:22,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:42:22,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:42:22,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:42:22,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:42:22,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:42:22,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:22,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:42:22,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:42:22,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:42:22,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:42:22,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:42:22,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:42:22,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:42:22,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:42:23,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:42:23,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:42:23,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:42:23,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:42:23,230 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:42:23,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-24 20:42:23,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b485704c0/4b9dd1f7f31d430d84beb42238456e46/FLAG7af186187 [2020-09-24 20:42:23,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:42:23,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-24 20:42:23,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b485704c0/4b9dd1f7f31d430d84beb42238456e46/FLAG7af186187 [2020-09-24 20:42:24,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b485704c0/4b9dd1f7f31d430d84beb42238456e46 [2020-09-24 20:42:24,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:42:24,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:42:24,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:24,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:42:24,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:42:24,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a75bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24, skipping insertion in model container [2020-09-24 20:42:24,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:42:24,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:42:24,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:24,455 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:42:24,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:24,486 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:42:24,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24 WrapperNode [2020-09-24 20:42:24,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:24,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:42:24,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:42:24,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:42:24,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... [2020-09-24 20:42:24,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:42:24,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:42:24,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:42:24,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:42:24,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:24,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:42:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:42:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:42:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:42:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:42:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:42:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:42:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:42:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:42:24,871 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:42:24,871 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:42:24,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:24 BoogieIcfgContainer [2020-09-24 20:42:24,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:42:24,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:42:24,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:42:24,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:42:24,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:42:24" (1/3) ... [2020-09-24 20:42:24,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be5de81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:24, skipping insertion in model container [2020-09-24 20:42:24,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:24" (2/3) ... [2020-09-24 20:42:24,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be5de81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:24, skipping insertion in model container [2020-09-24 20:42:24,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:24" (3/3) ... [2020-09-24 20:42:24,887 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-09-24 20:42:24,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:42:24,908 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:42:24,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:42:24,959 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:42:24,959 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:42:24,959 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:42:24,959 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:42:24,959 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:42:24,960 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:42:24,960 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:42:24,960 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:42:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-24 20:42:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-24 20:42:24,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:24,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:24,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-09-24 20:42:25,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:25,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600306624] [2020-09-24 20:42:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:25,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:42:25,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:25,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-24 20:42:25,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:42:25,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:42:25,630 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-09-24 20:42:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:25,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:25,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:25,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:42:25,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:25,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:25,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:25,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:25,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:25,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600306624] [2020-09-24 20:42:25,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:25,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:42:25,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624239687] [2020-09-24 20:42:25,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:42:25,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:42:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:42:25,711 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-09-24 20:42:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:25,833 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-09-24 20:42:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:42:25,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-24 20:42:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:25,844 INFO L225 Difference]: With dead ends: 38 [2020-09-24 20:42:25,844 INFO L226 Difference]: Without dead ends: 14 [2020-09-24 20:42:25,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-24 20:42:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-09-24 20:42:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-24 20:42:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-24 20:42:25,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-09-24 20:42:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:25,892 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-24 20:42:25,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:42:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-24 20:42:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 20:42:25,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:25,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:25,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:42:25,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -355776516, now seen corresponding path program 1 times [2020-09-24 20:42:25,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:25,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586818344] [2020-09-24 20:42:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:26,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 20:42:26,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-09-24 20:42:26,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:42:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:42:26,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:26,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:26,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:26,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:42:26,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:26,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:26,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586818344] [2020-09-24 20:42:26,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:26,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 20:42:26,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776239656] [2020-09-24 20:42:26,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:42:26,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:42:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:26,494 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-09-24 20:42:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:26,552 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-09-24 20:42:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:42:26,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-09-24 20:42:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:26,554 INFO L225 Difference]: With dead ends: 21 [2020-09-24 20:42:26,554 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 20:42:26,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:42:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 20:42:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-24 20:42:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-24 20:42:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-24 20:42:26,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-09-24 20:42:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:26,562 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-24 20:42:26,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:42:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-24 20:42:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 20:42:26,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:26,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:26,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:42:26,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1432978565, now seen corresponding path program 2 times [2020-09-24 20:42:26,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:26,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497966365] [2020-09-24 20:42:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:26,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:26,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 20:42:26,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:26,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-09-24 20:42:26,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:42:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:42:26,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:29,010 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-09-24 20:42:29,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:29,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:29,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:29,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:29,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:42:29,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:29,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:29,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497966365] [2020-09-24 20:42:29,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:29,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:42:29,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748222258] [2020-09-24 20:42:29,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:42:29,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:42:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:42:29,066 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-09-24 20:42:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:31,211 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-09-24 20:42:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:42:31,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-09-24 20:42:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:31,214 INFO L225 Difference]: With dead ends: 23 [2020-09-24 20:42:31,214 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 20:42:31,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:42:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 20:42:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-09-24 20:42:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 20:42:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 20:42:31,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-09-24 20:42:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:31,221 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 20:42:31,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:42:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 20:42:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 20:42:31,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:31,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:31,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:42:31,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1537029318, now seen corresponding path program 3 times [2020-09-24 20:42:31,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:31,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385990397] [2020-09-24 20:42:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:31,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:42:31,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:31,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-09-24 20:42:31,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:31,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:42:31,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 20:42:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:33,637 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (div c_main_~x~0 2))) (let ((.cse0 (* 2 .cse1))) (let ((.cse2 (= c_main_~x~0 .cse0)) (.cse13 (* 4294967296 (div c_main_~x~0 4294967296))) (.cse12 (* .cse1 (- 2)))) (let ((.cse9 (= c_main_~x~0 (+ .cse0 (* 4294967296 (div (+ .cse12 c_main_~x~0) 4294967296))))) (.cse10 (<= .cse13 c_main_~x~0)) (.cse7 (< c_main_~x~0 .cse13)) (.cse8 (not .cse2)) (.cse3 (= c_main_~x~0 (+ .cse0 (* 4294967296 (div (+ .cse12 c_main_~x~0 (- 2)) 4294967296)) 2)))) (let ((.cse6 (not .cse3)) (.cse11 (and .cse7 .cse8)) (.cse4 (or .cse2 .cse10)) (.cse5 (not .cse9))) (or (and (or (and (or (<= c_main_~x~0 .cse0) (<= .cse1 134217716) (<= c_main_~x~0 268435434)) (or (< 134217716 .cse1) (<= 268435434 c_main_~x~0))) .cse2) (or (and .cse3 .cse4 .cse5) (and .cse6 (or (and .cse7 .cse8 .cse9) (and (or .cse2 .cse10 .cse11) .cse5))))) (and (or .cse6 .cse9 .cse11) (or (and (or (and .cse7 .cse8 .cse4) .cse9) (or .cse2 .cse10 .cse5)) .cse3)))))))) is different from true [2020-09-24 20:42:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:33,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:33,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:33,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:42:33,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2020-09-24 20:42:33,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385990397] [2020-09-24 20:42:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:42:33,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162564551] [2020-09-24 20:42:33,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:42:33,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:42:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2020-09-24 20:42:33,685 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-09-24 20:42:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:33,767 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-24 20:42:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:42:33,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-09-24 20:42:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:33,769 INFO L225 Difference]: With dead ends: 24 [2020-09-24 20:42:33,769 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 20:42:33,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2020-09-24 20:42:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 20:42:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-24 20:42:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-24 20:42:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-24 20:42:33,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-09-24 20:42:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:33,782 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-24 20:42:33,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:42:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-24 20:42:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 20:42:33,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:33,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:33,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:42:33,784 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1549412153, now seen corresponding path program 4 times [2020-09-24 20:42:33,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:33,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850057862] [2020-09-24 20:42:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:33,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:34,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 20:42:34,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:34,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-24 20:42:34,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:42:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:42:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:38,542 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-09-24 20:42:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:38,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:38,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:38,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:38,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:38,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:38,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:38,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850057862] [2020-09-24 20:42:38,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:38,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:42:38,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488625629] [2020-09-24 20:42:38,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:42:38,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:42:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:42:38,589 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 9 states. [2020-09-24 20:42:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:40,813 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-24 20:42:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:42:40,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-09-24 20:42:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:40,815 INFO L225 Difference]: With dead ends: 27 [2020-09-24 20:42:40,816 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 20:42:40,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 20:42:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-24 20:42:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 20:42:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-24 20:42:40,826 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-09-24 20:42:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:40,826 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-24 20:42:40,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:42:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-24 20:42:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 20:42:40,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:40,828 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:40,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:42:40,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -202735752, now seen corresponding path program 5 times [2020-09-24 20:42:40,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:40,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192116002] [2020-09-24 20:42:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:40,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:41,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:41,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:41,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 20:42:41,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-24 20:42:41,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:42:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:42:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 20:42:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:43,422 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 55 DAG size of output: 12 [2020-09-24 20:42:43,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:43,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:43,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:43,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:43,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:43,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:43,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:43,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192116002] [2020-09-24 20:42:43,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:43,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:42:43,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957407748] [2020-09-24 20:42:43,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:42:43,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:42:43,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:43,458 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-09-24 20:42:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:43,604 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-09-24 20:42:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:42:43,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-09-24 20:42:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:43,606 INFO L225 Difference]: With dead ends: 22 [2020-09-24 20:42:43,606 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 20:42:43,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:42:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 20:42:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 20:42:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 20:42:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 20:42:43,608 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-09-24 20:42:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:43,608 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 20:42:43,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:42:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 20:42:43,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 20:42:43,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:43,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 20:42:45,893 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 45 DAG size of output: 12 [2020-09-24 20:42:45,896 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 20:42:45,896 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 20:42:45,896 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 20:42:45,897 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 20:42:45,897 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 20:42:45,897 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 20:42:45,897 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2020-09-24 20:42:45,897 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2020-09-24 20:42:45,897 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 20:42:45,897 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2020-09-24 20:42:45,898 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 15) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296))))) [2020-09-24 20:42:45,898 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* .cse0 2) (* (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296) 4294967296)))) [2020-09-24 20:42:45,898 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 20:42:45,898 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 20:42:45,898 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 20:42:45,899 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 20:42:45,899 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 20:42:45,899 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 20:42:45,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:42:45 BoogieIcfgContainer [2020-09-24 20:42:45,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:42:45,922 INFO L168 Benchmark]: Toolchain (without parser) took 21727.80 ms. Allocated memory was 145.8 MB in the beginning and 247.5 MB in the end (delta: 101.7 MB). Free memory was 102.2 MB in the beginning and 111.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 92.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:45,923 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 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. [2020-09-24 20:42:45,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.00 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:45,926 INFO L168 Benchmark]: Boogie Preprocessor took 117.69 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:45,926 INFO L168 Benchmark]: RCFGBuilder took 271.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 168.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:45,927 INFO L168 Benchmark]: TraceAbstraction took 21042.56 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 168.1 MB in the beginning and 111.9 MB in the end (delta: 56.2 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:45,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 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 287.00 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.69 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 168.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21042.56 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 168.1 MB in the beginning and 111.9 MB in the end (delta: 56.2 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) + 4294967296 * ((x / 2 * -2 + x) / 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.6s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 29 SDslu, 227 SDs, 0 SdLazy, 284 SolverSat, 13 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=5, 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 43 HoareAnnotationTreeSize, 13 FomulaSimplifications, 755 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 202 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 18746 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...