/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=DEEPEST --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 00:51:46,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:51:46,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:51:46,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:51:46,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:51:46,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:51:46,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:51:46,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:51:46,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:51:46,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:51:46,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:51:46,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:51:46,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:51:46,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:51:46,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:51:46,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:51:46,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:51:46,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:51:46,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:51:46,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:51:46,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:51:46,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:51:46,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:51:46,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:51:46,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:51:46,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:51:46,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:51:46,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:51:46,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:51:46,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:51:46,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:51:46,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:51:46,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:51:46,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:51:46,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:51:46,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:51:46,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:51:46,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:51:46,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:51:46,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:51:46,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:51:46,339 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 00:51:46,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:51:46,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:51:46,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:51:46,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:51:46,397 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:51:46,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:51:46,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:51:46,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:51:46,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:51:46,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:51:46,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:51:46,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:51:46,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:51:46,400 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:51:46,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:51:46,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:51:46,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:51:46,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:51:46,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:51:46,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:51:46,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:51:46,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:51:46,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:51:46,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:51:46,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:51:46,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:51:46,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:51:46,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:51:46,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:51:46,403 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 00:51:46,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:51:46,954 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:51:46,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:51:46,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:51:46,962 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:51:46,963 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 00:51:47,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad949bd22/0ba4eac1010c4e09a4e2eb8d899d5cd7/FLAGe64558ae1 [2020-09-25 00:51:47,613 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:51:47,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 00:51:47,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad949bd22/0ba4eac1010c4e09a4e2eb8d899d5cd7/FLAGe64558ae1 [2020-09-25 00:51:47,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad949bd22/0ba4eac1010c4e09a4e2eb8d899d5cd7 [2020-09-25 00:51:47,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:51:47,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:51:47,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:51:47,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:51:47,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:51:47,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:51:47" (1/1) ... [2020-09-25 00:51:47,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:47, skipping insertion in model container [2020-09-25 00:51:47,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:51:47" (1/1) ... [2020-09-25 00:51:47,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:51:48,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:51:48,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:51:48,225 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:51:48,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:51:48,271 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:51:48,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48 WrapperNode [2020-09-25 00:51:48,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:51:48,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:51:48,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:51:48,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:51:48,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (1/1) ... [2020-09-25 00:51:48,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:51:48,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:51:48,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:51:48,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:51:48,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (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 00:51:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:51:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:51:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:51:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:51:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:51:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 00:51:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:51:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:51:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:51:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:51:48,885 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:51:48,886 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:51:48,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:51:48 BoogieIcfgContainer [2020-09-25 00:51:48,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:51:48,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:51:48,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:51:48,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:51:48,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:51:47" (1/3) ... [2020-09-25 00:51:48,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3766701b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:51:48, skipping insertion in model container [2020-09-25 00:51:48,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:48" (2/3) ... [2020-09-25 00:51:48,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3766701b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:51:48, skipping insertion in model container [2020-09-25 00:51:48,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:51:48" (3/3) ... [2020-09-25 00:51:48,903 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-25 00:51:48,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:51:48,926 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:51:48,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:51:48,983 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:51:48,983 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:51:48,984 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:51:48,984 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:51:48,984 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:51:48,984 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:51:48,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:51:48,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:51:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-25 00:51:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 00:51:49,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:49,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:51:49,017 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-25 00:51:49,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:49,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168420897] [2020-09-25 00:51:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:49,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:49,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 00:51:49,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-25 00:51:49,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:51:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:49,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:51:49,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:51:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:49,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:49,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:49,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:51:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:51:49,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:49,310 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 00:51:49,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168420897] [2020-09-25 00:51:49,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:51:49,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 00:51:49,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837360887] [2020-09-25 00:51:49,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 00:51:49,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:51:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 00:51:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:51:49,345 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-25 00:51:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:51:49,381 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-25 00:51:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 00:51:49,383 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 00:51:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:51:49,395 INFO L225 Difference]: With dead ends: 62 [2020-09-25 00:51:49,395 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 00:51:49,400 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 00:51:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 00:51:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-25 00:51:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 00:51:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-25 00:51:49,456 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-25 00:51:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:51:49,457 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-25 00:51:49,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 00:51:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-25 00:51:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 00:51:49,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:49,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:51:49,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:51:49,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-25 00:51:49,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:49,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358019886] [2020-09-25 00:51:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:49,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:49,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:49,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 00:51:49,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:49,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 00:51:49,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:51:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:51:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 00:51:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:51:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:49,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:49,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:49,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:51:49,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:49,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:51:49,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:49,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:49,713 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 00:51:49,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358019886] [2020-09-25 00:51:49,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:51:49,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:51:49,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023741149] [2020-09-25 00:51:49,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:51:49,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:51:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:51:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:51:49,718 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-25 00:51:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:51:49,794 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-25 00:51:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:51:49,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 00:51:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:51:49,797 INFO L225 Difference]: With dead ends: 55 [2020-09-25 00:51:49,797 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 00:51:49,798 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 00:51:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 00:51:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-25 00:51:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 00:51:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-25 00:51:49,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-25 00:51:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:51:49,809 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-25 00:51:49,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:51:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-25 00:51:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 00:51:49,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:49,811 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 00:51:49,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:51:49,811 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-25 00:51:49,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:49,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921817774] [2020-09-25 00:51:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:49,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:51,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 00:51:51,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 00:51:51,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-09-25 00:51:51,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:51:51,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 00:51:51,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 00:51:51,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:51:51,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:51:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:51,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:51,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:51:51,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:51:51,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:51,587 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 00:51:51,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921817774] [2020-09-25 00:51:51,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:51:51,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:51:51,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28046633] [2020-09-25 00:51:51,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:51:51,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:51:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:51:51,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:51:51,591 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-09-25 00:51:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:51:51,743 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-09-25 00:51:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:51:51,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-25 00:51:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:51:51,748 INFO L225 Difference]: With dead ends: 96 [2020-09-25 00:51:51,748 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 00:51:51,749 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 00:51:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 00:51:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 00:51:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 00:51:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-09-25 00:51:51,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-09-25 00:51:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:51:51,759 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-09-25 00:51:51,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:51:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-09-25 00:51:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 00:51:51,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:51,761 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 00:51:51,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:51:51,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-25 00:51:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:51,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617564508] [2020-09-25 00:51:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:51:51,785 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:51:51,785 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:51:51,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:51:51,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:51:51 BoogieIcfgContainer [2020-09-25 00:51:51,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:51:51,815 INFO L168 Benchmark]: Toolchain (without parser) took 3858.85 ms. Allocated memory was 147.8 MB in the beginning and 243.3 MB in the end (delta: 95.4 MB). Free memory was 104.5 MB in the beginning and 207.4 MB in the end (delta: -102.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:51:51,816 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:51:51,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.22 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 93.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:51,818 INFO L168 Benchmark]: Boogie Preprocessor took 150.76 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.7 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:51,819 INFO L168 Benchmark]: RCFGBuilder took 467.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 164.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:51,820 INFO L168 Benchmark]: TraceAbstraction took 2918.55 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 164.3 MB in the beginning and 207.4 MB in the end (delta: -43.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:51:51,824 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.22 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 93.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.76 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.7 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 467.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 164.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2918.55 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 164.3 MB in the beginning and 207.4 MB in the end (delta: -43.1 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: 2.8s, 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, 0.0s 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, 2.1s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 9976 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...