/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=LOWLEXORDER --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 21:50:00,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:00,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:00,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:00,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:00,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:00,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:00,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:00,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:00,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:00,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:00,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:00,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:00,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:00,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:00,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:00,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:00,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:00,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:00,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:00,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:00,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:00,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:00,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:00,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:00,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:00,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:00,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:00,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:00,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:00,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:00,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:00,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:00,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:00,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:00,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:00,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:00,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:00,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:00,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:00,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:00,580 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 21:50:00,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:00,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:00,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:00,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:00,635 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:00,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:00,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:00,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:00,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:00,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:00,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:00,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:00,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:00,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:00,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:00,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:00,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:00,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:00,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:00,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:00,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:00,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:00,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:00,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:00,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:00,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:00,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:00,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:00,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:00,642 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:01,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:01,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:01,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:01,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:01,164 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:01,165 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 21:50:01,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46aa4e0f7/b85455e05f9148ec90dd13726e4a3d47/FLAG3ff20e96f [2020-09-24 21:50:01,754 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:01,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 21:50:01,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46aa4e0f7/b85455e05f9148ec90dd13726e4a3d47/FLAG3ff20e96f [2020-09-24 21:50:02,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46aa4e0f7/b85455e05f9148ec90dd13726e4a3d47 [2020-09-24 21:50:02,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:02,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:02,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:02,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:02,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:02,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02, skipping insertion in model container [2020-09-24 21:50:02,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:02,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:02,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:02,456 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:02,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:02,486 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:02,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02 WrapperNode [2020-09-24 21:50:02,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:02,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:02,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:02,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:02,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (1/1) ... [2020-09-24 21:50:02,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:02,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:02,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:02,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:02,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (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 21:50:02,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:02,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:02,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:02,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:02,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:02,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:02,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:02,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:02,896 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:02,897 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:50:02,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:02 BoogieIcfgContainer [2020-09-24 21:50:02,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:02,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:02,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:02,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:02,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:02" (1/3) ... [2020-09-24 21:50:02,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e553d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:02, skipping insertion in model container [2020-09-24 21:50:02,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:02" (2/3) ... [2020-09-24 21:50:02,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e553d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:02, skipping insertion in model container [2020-09-24 21:50:02,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:02" (3/3) ... [2020-09-24 21:50:02,914 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-24 21:50:02,929 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:02,939 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:02,969 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:03,012 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:03,012 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:03,012 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:03,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:03,013 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:03,013 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:03,013 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:03,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 21:50:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 21:50:03,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:03,050 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,059 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-24 21:50:03,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114702400] [2020-09-24 21:50:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 21:50:03,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-24 21:50:03,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:03,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:50:03,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:03,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:03,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:03,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:03,426 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 21:50:03,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114702400] [2020-09-24 21:50:03,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:03,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:50:03,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204975770] [2020-09-24 21:50:03,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:50:03,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:50:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:50:03,460 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-24 21:50:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,559 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-09-24 21:50:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:50:03,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-24 21:50:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,573 INFO L225 Difference]: With dead ends: 48 [2020-09-24 21:50:03,573 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 21:50:03,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 21:50:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-24 21:50:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 21:50:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-24 21:50:03,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-24 21:50:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,624 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-24 21:50:03,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:50:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-24 21:50:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 21:50:03,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,626 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 21:50:03,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:03,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-24 21:50:03,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58849095] [2020-09-24 21:50:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:50:03,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 21:50:03,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:50:03,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:03,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:03,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:03,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:03,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:03,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58849095] [2020-09-24 21:50:03,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:03,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:50:03,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864148084] [2020-09-24 21:50:03,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:50:03,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:03,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:50:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:50:03,876 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-24 21:50:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,982 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-24 21:50:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:50:03,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 21:50:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,985 INFO L225 Difference]: With dead ends: 45 [2020-09-24 21:50:03,985 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 21:50:03,986 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 21:50:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 21:50:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-24 21:50:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 21:50:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 21:50:03,996 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-24 21:50:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,997 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 21:50:03,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:50:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 21:50:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 21:50:03,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:04,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:04,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-24 21:50:04,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:04,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749449591] [2020-09-24 21:50:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 21:50:04,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:04,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-09-24 21:50:04,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:50:04,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:04,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:04,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:04,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:04,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:04,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749449591] [2020-09-24 21:50:04,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:04,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:50:04,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440066072] [2020-09-24 21:50:04,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:50:04,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:50:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:50:04,402 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-24 21:50:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:04,540 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-24 21:50:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:50:04,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-24 21:50:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:04,541 INFO L225 Difference]: With dead ends: 45 [2020-09-24 21:50:04,542 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 21:50:04,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 21:50:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 21:50:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:50:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-24 21:50:04,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-09-24 21:50:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:04,550 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-24 21:50:04,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:50:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-24 21:50:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 21:50:04,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:04,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:04,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:04,552 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times [2020-09-24 21:50:04,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:04,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283858450] [2020-09-24 21:50:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 21:50:05,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-09-24 21:50:05,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:50:05,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:05,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:05,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:05,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:05,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:05,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283858450] [2020-09-24 21:50:05,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:05,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:50:05,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711740825] [2020-09-24 21:50:05,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:50:05,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:50:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:50:05,121 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-09-24 21:50:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:05,262 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-24 21:50:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:50:05,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 21:50:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:05,264 INFO L225 Difference]: With dead ends: 44 [2020-09-24 21:50:05,264 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 21:50:05,265 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 21:50:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 21:50:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 21:50:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:50:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 21:50:05,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-09-24 21:50:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:05,272 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 21:50:05,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:50:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 21:50:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 21:50:05,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:05,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:05,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:05,274 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times [2020-09-24 21:50:05,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:05,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209397987] [2020-09-24 21:50:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:50:05,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:05,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-09-24 21:50:05,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:05,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:05,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 21:50:05,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:05,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:05,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:05,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209397987] [2020-09-24 21:50:05,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:05,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:50:05,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843765321] [2020-09-24 21:50:05,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:50:05,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:05,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:50:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:05,937 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2020-09-24 21:50:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:06,212 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-24 21:50:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:50:06,213 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-24 21:50:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:06,217 INFO L225 Difference]: With dead ends: 49 [2020-09-24 21:50:06,217 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 21:50:06,219 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 21:50:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 21:50:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 21:50:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 21:50:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-24 21:50:06,235 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-24 21:50:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:06,235 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-24 21:50:06,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:50:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-24 21:50:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 21:50:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:06,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:06,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:06,240 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times [2020-09-24 21:50:06,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:06,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452941307] [2020-09-24 21:50:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:06,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 21:50:06,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:06,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-09-24 21:50:06,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:50:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:06,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:07,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:07,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:07,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:07,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:07,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:07,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:07,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:07,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452941307] [2020-09-24 21:50:07,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:07,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:50:07,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470132460] [2020-09-24 21:50:07,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:50:07,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:50:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:50:07,134 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-09-24 21:50:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:07,367 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-24 21:50:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:50:07,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-24 21:50:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:07,369 INFO L225 Difference]: With dead ends: 54 [2020-09-24 21:50:07,369 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 21:50:07,372 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 21:50:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 21:50:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 21:50:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 21:50:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-24 21:50:07,386 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-24 21:50:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:07,386 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-24 21:50:07,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:50:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-24 21:50:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 21:50:07,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:07,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:07,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:07,390 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:07,391 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 3 times [2020-09-24 21:50:07,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:07,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92898541] [2020-09-24 21:50:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:07,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:08,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 21:50:08,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:08,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-09-24 21:50:08,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:50:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:50:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:08,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:08,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:08,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:08,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:08,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:08,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:08,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:08,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:08,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:08,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:08,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92898541] [2020-09-24 21:50:08,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:08,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:50:08,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584070288] [2020-09-24 21:50:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:50:08,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:50:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:50:08,279 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-09-24 21:50:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:08,534 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-24 21:50:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:50:08,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-09-24 21:50:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:08,536 INFO L225 Difference]: With dead ends: 59 [2020-09-24 21:50:08,537 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 21:50:08,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:50:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 21:50:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-24 21:50:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 21:50:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 21:50:08,553 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-24 21:50:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:08,554 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 21:50:08,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:50:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 21:50:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 21:50:08,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:08,558 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:08,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:08,558 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 4 times [2020-09-24 21:50:08,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:08,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347442635] [2020-09-24 21:50:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:08,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:09,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:50:09,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-09-24 21:50:09,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:50:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:50:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:09,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:09,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:09,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:09,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:09,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:09,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:09,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:09,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347442635] [2020-09-24 21:50:09,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:09,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:50:09,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030139980] [2020-09-24 21:50:09,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:50:09,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:50:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:50:09,252 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-24 21:50:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:09,573 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-24 21:50:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:50:09,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-24 21:50:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:09,574 INFO L225 Difference]: With dead ends: 61 [2020-09-24 21:50:09,574 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 21:50:09,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:50:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 21:50:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-24 21:50:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 21:50:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-24 21:50:09,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-24 21:50:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:09,595 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-24 21:50:09,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:50:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-24 21:50:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:50:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:09,597 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 21:50:09,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:09,599 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:09,599 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 5 times [2020-09-24 21:50:09,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:09,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204873087] [2020-09-24 21:50:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:50:09,615 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:50:09,615 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:50:09,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:09,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:50:09 BoogieIcfgContainer [2020-09-24 21:50:09,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:50:09,658 INFO L168 Benchmark]: Toolchain (without parser) took 7547.73 ms. Allocated memory was 145.8 MB in the beginning and 280.5 MB in the end (delta: 134.7 MB). Free memory was 101.8 MB in the beginning and 126.5 MB in the end (delta: -24.7 MB). Peak memory consumption was 110.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,659 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.35 ms. Allocated memory is still 145.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,662 INFO L168 Benchmark]: Boogie Preprocessor took 118.80 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 182.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,662 INFO L168 Benchmark]: RCFGBuilder took 296.54 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 169.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,666 INFO L168 Benchmark]: TraceAbstraction took 6745.10 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 169.7 MB in the beginning and 126.5 MB in the end (delta: 43.2 MB). Peak memory consumption was 121.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:09,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.35 ms. Allocated memory is still 145.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.80 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 182.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.54 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 169.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6745.10 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 169.7 MB in the beginning and 126.5 MB in the end (delta: 43.2 MB). Peak memory consumption was 121.3 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: 6.6s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 139 SDslu, 785 SDs, 0 SdLazy, 432 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 21550 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 0/324 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...