/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:54:59,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:54:59,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:54:59,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:54:59,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:54:59,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:54:59,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:54:59,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:54:59,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:54:59,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:54:59,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:54:59,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:54:59,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:54:59,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:54:59,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:54:59,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:54:59,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:54:59,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:54:59,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:54:59,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:54:59,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:54:59,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:54:59,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:54:59,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:54:59,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:54:59,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:54:59,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:54:59,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:54:59,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:54:59,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:54:59,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:54:59,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:54:59,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:54:59,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:54:59,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:54:59,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:54:59,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:54:59,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:54:59,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:54:59,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:54:59,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:54:59,403 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 [2020-08-21 23:54:59,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:54:59,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:54:59,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:54:59,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:54:59,430 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:54:59,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:54:59,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:54:59,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:54:59,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:54:59,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:54:59,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:54:59,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:54:59,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:54:59,432 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:54:59,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:54:59,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:54:59,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:54:59,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:54:59,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:54:59,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:54:59,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:54:59,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:54:59,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:54:59,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:54:59,436 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:54:59,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:54:59,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:54:59,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:54:59,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:54:59,787 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:54:59,788 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-08-21 23:54:59,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3164bb0d9/5b4cf2fc8dfd4ddfa7ad71858f9e64ff/FLAG2f2f02515 [2020-08-21 23:55:00,309 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:55:00,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-08-21 23:55:00,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3164bb0d9/5b4cf2fc8dfd4ddfa7ad71858f9e64ff/FLAG2f2f02515 [2020-08-21 23:55:00,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3164bb0d9/5b4cf2fc8dfd4ddfa7ad71858f9e64ff [2020-08-21 23:55:00,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:55:00,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:55:00,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:00,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:55:00,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:55:00,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:00,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5618fa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00, skipping insertion in model container [2020-08-21 23:55:00,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:00,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:55:00,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:55:00,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:00,938 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:55:00,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:00,970 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:55:00,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00 WrapperNode [2020-08-21 23:55:00,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:00,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:55:00,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:55:00,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:55:00,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:00,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:00,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:00,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:01,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:01,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:01,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (1/1) ... [2020-08-21 23:55:01,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:55:01,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:55:01,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:55:01,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:55:01,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (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 [2020-08-21 23:55:01,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:55:01,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:55:01,143 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:55:01,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:55:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:55:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:55:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:55:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:55:01,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:55:01,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:55:01,324 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:55:01,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:01 BoogieIcfgContainer [2020-08-21 23:55:01,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:55:01,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:55:01,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:55:01,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:55:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:55:00" (1/3) ... [2020-08-21 23:55:01,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430062a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:01, skipping insertion in model container [2020-08-21 23:55:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:00" (2/3) ... [2020-08-21 23:55:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430062a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:01, skipping insertion in model container [2020-08-21 23:55:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:01" (3/3) ... [2020-08-21 23:55:01,338 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-08-21 23:55:01,350 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:55:01,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:55:01,374 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:55:01,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:55:01,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:55:01,400 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:55:01,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:55:01,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:55:01,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:55:01,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:55:01,401 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:55:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 23:55:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 23:55:01,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:01,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:01,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-21 23:55:01,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:01,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170148206] [2020-08-21 23:55:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:01,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170148206] [2020-08-21 23:55:01,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:01,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 23:55:01,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664533487] [2020-08-21 23:55:01,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 23:55:01,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 23:55:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 23:55:01,601 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-21 23:55:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:01,626 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-21 23:55:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 23:55:01,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 23:55:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:01,636 INFO L225 Difference]: With dead ends: 30 [2020-08-21 23:55:01,637 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 23:55:01,641 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 [2020-08-21 23:55:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 23:55:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 23:55:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 23:55:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-21 23:55:01,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-21 23:55:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:01,674 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-21 23:55:01,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 23:55:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-21 23:55:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 23:55:01,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:01,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:01,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:55:01,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:01,677 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-21 23:55:01,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:01,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083765412] [2020-08-21 23:55:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:01,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083765412] [2020-08-21 23:55:01,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:01,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:55:01,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936901803] [2020-08-21 23:55:01,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:55:01,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:01,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:55:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:55:01,743 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-08-21 23:55:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:01,795 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-08-21 23:55:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:55:01,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 23:55:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:01,798 INFO L225 Difference]: With dead ends: 24 [2020-08-21 23:55:01,798 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 23:55:01,799 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 [2020-08-21 23:55:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 23:55:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-21 23:55:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 23:55:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-21 23:55:01,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-21 23:55:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:01,807 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-21 23:55:01,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:55:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-21 23:55:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 23:55:01,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:01,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:01,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:55:01,823 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-21 23:55:01,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:01,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661872831] [2020-08-21 23:55:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:01,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661872831] [2020-08-21 23:55:01,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:01,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 23:55:01,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527502836] [2020-08-21 23:55:01,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:55:01,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:01,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:55:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:01,911 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-08-21 23:55:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:01,954 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-08-21 23:55:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:55:01,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-08-21 23:55:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:01,956 INFO L225 Difference]: With dead ends: 27 [2020-08-21 23:55:01,956 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 23:55:01,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 23:55:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-21 23:55:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 23:55:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 23:55:01,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 23:55:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:01,963 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 23:55:01,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:55:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 23:55:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 23:55:01,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:01,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:01,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:55:01,965 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-21 23:55:01,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:01,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409567080] [2020-08-21 23:55:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:02,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409567080] [2020-08-21 23:55:02,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:02,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 23:55:02,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678321908] [2020-08-21 23:55:02,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:55:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:55:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:55:02,059 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-08-21 23:55:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,109 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-21 23:55:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:55:02,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 23:55:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,111 INFO L225 Difference]: With dead ends: 30 [2020-08-21 23:55:02,111 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 23:55:02,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:55:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 23:55:02,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-21 23:55:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 23:55:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 23:55:02,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-08-21 23:55:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,119 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 23:55:02,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:55:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 23:55:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:55:02,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,121 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:55:02,121 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-08-21 23:55:02,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262850116] [2020-08-21 23:55:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:55:02,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262850116] [2020-08-21 23:55:02,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:02,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:55:02,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239372629] [2020-08-21 23:55:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:55:02,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:55:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:02,175 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-08-21 23:55:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,224 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-08-21 23:55:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:55:02,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 23:55:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,226 INFO L225 Difference]: With dead ends: 30 [2020-08-21 23:55:02,226 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 23:55:02,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 23:55:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-08-21 23:55:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 23:55:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-21 23:55:02,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-08-21 23:55:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,240 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-21 23:55:02,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:55:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-21 23:55:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 23:55:02,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,242 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:55:02,243 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-08-21 23:55:02,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791677512] [2020-08-21 23:55:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:55:02,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791677512] [2020-08-21 23:55:02,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:02,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 23:55:02,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352529117] [2020-08-21 23:55:02,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:55:02,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:55:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:55:02,304 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-08-21 23:55:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,340 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-21 23:55:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:55:02,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 23:55:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,343 INFO L225 Difference]: With dead ends: 33 [2020-08-21 23:55:02,343 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 23:55:02,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:55:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 23:55:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 23:55:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 23:55:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-21 23:55:02,351 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-08-21 23:55:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,352 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-21 23:55:02,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:55:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-21 23:55:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 23:55:02,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:55:02,354 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-08-21 23:55:02,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055188235] [2020-08-21 23:55:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:55:02,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055188235] [2020-08-21 23:55:02,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:02,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 23:55:02,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628145796] [2020-08-21 23:55:02,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:55:02,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:55:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:55:02,420 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-08-21 23:55:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,469 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-21 23:55:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:55:02,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-21 23:55:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,471 INFO L225 Difference]: With dead ends: 36 [2020-08-21 23:55:02,471 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 23:55:02,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:55:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 23:55:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-21 23:55:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 23:55:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-21 23:55:02,478 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-08-21 23:55:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,479 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-21 23:55:02,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:55:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-21 23:55:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 23:55:02,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,481 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:55:02,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-08-21 23:55:02,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333574083] [2020-08-21 23:55:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:55:02,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333574083] [2020-08-21 23:55:02,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:02,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 23:55:02,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373817954] [2020-08-21 23:55:02,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:55:02,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:55:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:55:02,610 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-08-21 23:55:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,660 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-21 23:55:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 23:55:02,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-21 23:55:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,662 INFO L225 Difference]: With dead ends: 39 [2020-08-21 23:55:02,662 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 23:55:02,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:55:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 23:55:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 23:55:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 23:55:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-21 23:55:02,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-08-21 23:55:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,670 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-21 23:55:02,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:55:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-21 23:55:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 23:55:02,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,672 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:55:02,672 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-08-21 23:55:02,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900143667] [2020-08-21 23:55:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:55:02,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900143667] [2020-08-21 23:55:02,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:02,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 23:55:02,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634090498] [2020-08-21 23:55:02,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:55:02,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:02,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:55:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:02,763 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-08-21 23:55:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:02,827 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-21 23:55:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:55:02,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 23:55:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:02,833 INFO L225 Difference]: With dead ends: 40 [2020-08-21 23:55:02,833 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 23:55:02,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 23:55:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-21 23:55:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 23:55:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-08-21 23:55:02,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-08-21 23:55:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:02,845 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-08-21 23:55:02,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:55:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-08-21 23:55:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 23:55:02,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:02,847 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:02,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:55:02,848 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:02,848 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-08-21 23:55:02,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:02,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078051107] [2020-08-21 23:55:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:55:02,879 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:55:02,880 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:55:02,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:55:02,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:55:02 BoogieIcfgContainer [2020-08-21 23:55:02,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:55:02,907 INFO L168 Benchmark]: Toolchain (without parser) took 2188.78 ms. Allocated memory was 140.0 MB in the beginning and 237.0 MB in the end (delta: 97.0 MB). Free memory was 103.5 MB in the beginning and 179.8 MB in the end (delta: -76.2 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,908 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.23 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,910 INFO L168 Benchmark]: Boogie Preprocessor took 102.41 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 181.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,911 INFO L168 Benchmark]: RCFGBuilder took 254.79 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,912 INFO L168 Benchmark]: TraceAbstraction took 1574.47 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 170.0 MB in the beginning and 179.8 MB in the end (delta: -9.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:02,916 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.23 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.41 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 181.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.79 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1574.47 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 170.0 MB in the beginning and 179.8 MB in the end (delta: -9.8 MB). Peak memory consumption was 24.3 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 57 SDslu, 208 SDs, 0 SdLazy, 136 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, 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, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 5925 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 140/196 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...