/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:55:38,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:38,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:38,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:38,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:38,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:38,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:38,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:38,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:38,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:38,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:38,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:38,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:38,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:38,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:38,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:38,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:38,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:38,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:38,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:38,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:38,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:38,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:38,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:38,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:38,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:38,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:38,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:38,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:38,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:38,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:38,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:38,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:38,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:38,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:38,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:38,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:38,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:38,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:38,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:38,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:38,537 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 22:55:38,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:38,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:38,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:38,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:38,571 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:38,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:38,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:38,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:38,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:38,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:38,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:38,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:38,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:38,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:38,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:38,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:38,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:38,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:38,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:38,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:38,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:38,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:38,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:38,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:38,581 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:39,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:39,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:39,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:39,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:39,103 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:39,104 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 22:55:39,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cd5d6c6b/ea24cd1df744444ea0d1e5bfcccfa659/FLAG0d41e6852 [2020-09-24 22:55:39,736 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:39,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 22:55:39,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cd5d6c6b/ea24cd1df744444ea0d1e5bfcccfa659/FLAG0d41e6852 [2020-09-24 22:55:40,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cd5d6c6b/ea24cd1df744444ea0d1e5bfcccfa659 [2020-09-24 22:55:40,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:40,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:40,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:40,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:40,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:40,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40, skipping insertion in model container [2020-09-24 22:55:40,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:40,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:40,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:40,362 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:40,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:40,397 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:40,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40 WrapperNode [2020-09-24 22:55:40,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:40,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:40,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:40,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:40,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (1/1) ... [2020-09-24 22:55:40,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:40,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:40,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:40,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:40,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (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 22:55:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:55:40,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:55:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:40,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:40,825 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 22:55:40,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:40 BoogieIcfgContainer [2020-09-24 22:55:40,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:40,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:40,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:40,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:40,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:40" (1/3) ... [2020-09-24 22:55:40,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:40, skipping insertion in model container [2020-09-24 22:55:40,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:40" (2/3) ... [2020-09-24 22:55:40,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:40, skipping insertion in model container [2020-09-24 22:55:40,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:40" (3/3) ... [2020-09-24 22:55:40,841 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-24 22:55:40,856 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:40,866 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:40,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:40,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:40,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:40,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:40,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:40,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:40,924 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:40,924 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:40,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 22:55:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 22:55:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:40,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:40,957 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-24 22:55:40,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:40,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359797183] [2020-09-24 22:55:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 22:55:41,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:41,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-24 22:55:41,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:55:41,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:41,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:55:41,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:41,247 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 22:55:41,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359797183] [2020-09-24 22:55:41,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:41,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 22:55:41,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80878675] [2020-09-24 22:55:41,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 22:55:41,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 22:55:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:55:41,279 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-24 22:55:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:41,307 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-24 22:55:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 22:55:41,309 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 22:55:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:41,319 INFO L225 Difference]: With dead ends: 35 [2020-09-24 22:55:41,320 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 22:55:41,324 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 [2020-09-24 22:55:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 22:55:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-24 22:55:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-24 22:55:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-24 22:55:41,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-24 22:55:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:41,366 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-24 22:55:41,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 22:55:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-24 22:55:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 22:55:41,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:41,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:41,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:41,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-24 22:55:41,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:41,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050632582] [2020-09-24 22:55:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 22:55:41,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:41,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 22:55:41,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:41,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 22:55:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:55:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:55:41,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:55:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:41,557 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 22:55:41,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050632582] [2020-09-24 22:55:41,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:41,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 22:55:41,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243038902] [2020-09-24 22:55:41,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 22:55:41,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 22:55:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:55:41,567 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-24 22:55:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:41,621 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-24 22:55:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 22:55:41,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-24 22:55:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:41,623 INFO L225 Difference]: With dead ends: 34 [2020-09-24 22:55:41,623 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 22:55:41,625 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 [2020-09-24 22:55:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 22:55:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-24 22:55:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 22:55:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 22:55:41,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-24 22:55:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:41,632 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 22:55:41,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 22:55:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 22:55:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 22:55:41,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:41,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:41,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:41,634 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-24 22:55:41,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:41,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873251916] [2020-09-24 22:55:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 22:55:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-24 22:55:41,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:55:41,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:41,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:41,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:41,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873251916] [2020-09-24 22:55:41,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:41,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:55:41,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706888257] [2020-09-24 22:55:41,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:55:41,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:55:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:55:41,813 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 22:55:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:41,884 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-09-24 22:55:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 22:55:41,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 22:55:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:41,886 INFO L225 Difference]: With dead ends: 32 [2020-09-24 22:55:41,886 INFO L226 Difference]: Without dead ends: 27 [2020-09-24 22:55:41,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:55:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-24 22:55:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-24 22:55:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 22:55:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 22:55:41,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-09-24 22:55:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:41,893 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 22:55:41,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:55:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 22:55:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 22:55:41,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:41,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:41,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:41,895 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash -425824350, now seen corresponding path program 1 times [2020-09-24 22:55:41,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:41,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810126610] [2020-09-24 22:55:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 22:55:42,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-09-24 22:55:42,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 22:55:42,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:42,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:42,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:42,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:42,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:42,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810126610] [2020-09-24 22:55:42,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:42,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:55:42,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535253014] [2020-09-24 22:55:42,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:55:42,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:42,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:55:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:55:42,274 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-24 22:55:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:42,365 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-24 22:55:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 22:55:42,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-24 22:55:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:42,369 INFO L225 Difference]: With dead ends: 37 [2020-09-24 22:55:42,370 INFO L226 Difference]: Without dead ends: 32 [2020-09-24 22:55:42,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-24 22:55:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-09-24 22:55:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-24 22:55:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-24 22:55:42,378 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-09-24 22:55:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:42,378 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-24 22:55:42,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:55:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-24 22:55:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 22:55:42,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:42,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:42,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:42,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash 374672875, now seen corresponding path program 2 times [2020-09-24 22:55:42,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:42,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626901086] [2020-09-24 22:55:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 22:55:42,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-09-24 22:55:42,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 22:55:42,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:42,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:42,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:42,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:42,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:42,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626901086] [2020-09-24 22:55:42,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:42,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 22:55:42,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212041010] [2020-09-24 22:55:42,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 22:55:42,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 22:55:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:55:42,908 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-09-24 22:55:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:43,080 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-24 22:55:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 22:55:43,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-24 22:55:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:43,082 INFO L225 Difference]: With dead ends: 42 [2020-09-24 22:55:43,082 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 22:55:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 22:55:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 22:55:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 22:55:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-09-24 22:55:43,089 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2020-09-24 22:55:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:43,090 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-09-24 22:55:43,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 22:55:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-09-24 22:55:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 22:55:43,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:43,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:43,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:43,092 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1654846786, now seen corresponding path program 3 times [2020-09-24 22:55:43,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:43,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263361384] [2020-09-24 22:55:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:43,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:43,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 22:55:43,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:43,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-09-24 22:55:43,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:43,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 22:55:43,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:43,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:43,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:43,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:43,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263361384] [2020-09-24 22:55:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:43,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:55:43,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049591121] [2020-09-24 22:55:43,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:55:43,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:55:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:43,851 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-09-24 22:55:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:44,083 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-09-24 22:55:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 22:55:44,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-09-24 22:55:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:44,086 INFO L225 Difference]: With dead ends: 47 [2020-09-24 22:55:44,086 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 22:55:44,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:55:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 22:55:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-24 22:55:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 22:55:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-24 22:55:44,102 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-09-24 22:55:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:44,102 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-24 22:55:44,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:55:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-24 22:55:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 22:55:44,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:44,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:44,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:44,106 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2107438005, now seen corresponding path program 4 times [2020-09-24 22:55:44,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:44,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059151489] [2020-09-24 22:55:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:44,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 22:55:44,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-09-24 22:55:44,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:55:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 22:55:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:44,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:44,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:44,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:44,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:44,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:44,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:44,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 22:55:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:44,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059151489] [2020-09-24 22:55:44,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:44,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 22:55:44,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262551039] [2020-09-24 22:55:44,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 22:55:44,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 22:55:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:44,988 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2020-09-24 22:55:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:45,200 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-09-24 22:55:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 22:55:45,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-09-24 22:55:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:45,202 INFO L225 Difference]: With dead ends: 49 [2020-09-24 22:55:45,202 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 22:55:45,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 22:55:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 22:55:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-24 22:55:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 22:55:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-09-24 22:55:45,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2020-09-24 22:55:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:45,209 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-09-24 22:55:45,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 22:55:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-09-24 22:55:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 22:55:45,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:45,211 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:45,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:55:45,211 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1988824350, now seen corresponding path program 5 times [2020-09-24 22:55:45,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:45,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567552473] [2020-09-24 22:55:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 22:55:45,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-09-24 22:55:45,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:55:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 22:55:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 22:55:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:45,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:45,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:45,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:45,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:45,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567552473] [2020-09-24 22:55:45,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:45,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 22:55:45,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347442635] [2020-09-24 22:55:45,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 22:55:45,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 22:55:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:45,758 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 15 states. [2020-09-24 22:55:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:46,051 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-09-24 22:55:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 22:55:46,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-09-24 22:55:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:46,055 INFO L225 Difference]: With dead ends: 91 [2020-09-24 22:55:46,055 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 22:55:46,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 22:55:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 22:55:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-24 22:55:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 22:55:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-24 22:55:46,063 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 43 [2020-09-24 22:55:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:46,063 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-24 22:55:46,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 22:55:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-24 22:55:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 22:55:46,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:46,065 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:46,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:55:46,066 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 6 times [2020-09-24 22:55:46,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:46,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408776364] [2020-09-24 22:55:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:55:46,083 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:55:46,083 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:55:46,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:55:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:55:46 BoogieIcfgContainer [2020-09-24 22:55:46,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:55:46,110 INFO L168 Benchmark]: Toolchain (without parser) took 6017.79 ms. Allocated memory was 140.0 MB in the beginning and 278.4 MB in the end (delta: 138.4 MB). Free memory was 103.7 MB in the beginning and 243.0 MB in the end (delta: -139.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:55:46,111 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.77 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,113 INFO L168 Benchmark]: Boogie Preprocessor took 103.65 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 182.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,114 INFO L168 Benchmark]: RCFGBuilder took 329.03 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,115 INFO L168 Benchmark]: TraceAbstraction took 5274.37 ms. Allocated memory was 202.4 MB in the beginning and 278.4 MB in the end (delta: 76.0 MB). Free memory was 169.5 MB in the beginning and 243.0 MB in the end (delta: -73.6 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.77 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.65 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 182.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.03 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5274.37 ms. Allocated memory was 202.4 MB in the beginning and 278.4 MB in the end (delta: 76.0 MB). Free memory was 169.5 MB in the beginning and 243.0 MB in the end (delta: -73.6 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 117 SDslu, 437 SDs, 0 SdLazy, 295 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 262 NumberOfCodeBlocks, 262 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 199 ConstructedInterpolants, 0 QuantifiedInterpolants, 13161 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 25/196 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...