/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:27:00,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:27:00,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:27:00,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 20:27:00,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:27:00,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:27:00,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:27:00,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:27:00,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:27:00,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:27:00,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:27:00,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:27:00,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:27:00,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:27:00,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:27:00,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:27:00,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:27:00,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:27:00,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:27:00,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:27:00,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:27:00,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:27:00,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:27:00,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:27:00,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:27:00,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:27:00,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:27:00,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:27:00,928 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 [2020-08-18 20:27:00,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:27:00,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:27:00,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:27:00,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:27:00,953 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:27:00,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:27:00,954 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:27:00,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:27:00,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:27:00,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:27:00,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:27:00,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:27:00,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:27:00,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:27:00,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:27:00,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:27:00,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:27:00,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:27:00,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:27:00,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:27:00,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:27:00,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:27:00,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:27:00,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:27:00,958 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=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:27:01,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:27:01,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:27:01,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:27:01,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:27:01,330 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:27:01,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 20:27:01,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccb58174/d8c1e9e3249e4378998cf7efc836be4b/FLAG6c6bee8e4 [2020-08-18 20:27:01,859 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:27:01,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 20:27:01,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccb58174/d8c1e9e3249e4378998cf7efc836be4b/FLAG6c6bee8e4 [2020-08-18 20:27:02,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fccb58174/d8c1e9e3249e4378998cf7efc836be4b [2020-08-18 20:27:02,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:27:02,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:27:02,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:27:02,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:27:02,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:27:02,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdfc9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02, skipping insertion in model container [2020-08-18 20:27:02,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:27:02,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:27:02,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:27:02,521 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:27:02,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:27:02,551 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:27:02,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02 WrapperNode [2020-08-18 20:27:02,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:27:02,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:27:02,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:27:02,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:27:02,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (1/1) ... [2020-08-18 20:27:02,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:27:02,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:27:02,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:27:02,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:27:02,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (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 [2020-08-18 20:27:02,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:27:02,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:27:02,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 20:27:02,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 20:27:02,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:27:02,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:27:02,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:27:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 20:27:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 20:27:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:27:02,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:27:02,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:27:02,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:27:02,987 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:27:02,987 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 20:27:02,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:27:02 BoogieIcfgContainer [2020-08-18 20:27:02,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:27:02,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:27:02,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:27:02,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:27:02,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:27:02" (1/3) ... [2020-08-18 20:27:02,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e47c463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:27:02, skipping insertion in model container [2020-08-18 20:27:02,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:02" (2/3) ... [2020-08-18 20:27:02,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e47c463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:27:02, skipping insertion in model container [2020-08-18 20:27:02,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:27:02" (3/3) ... [2020-08-18 20:27:03,000 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-18 20:27:03,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:27:03,019 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:27:03,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:27:03,061 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:27:03,061 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:27:03,061 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:27:03,061 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:27:03,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:27:03,062 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:27:03,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:27:03,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:27:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 20:27:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 20:27:03,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:03,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:03,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-18 20:27:03,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:03,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319201496] [2020-08-18 20:27:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,613 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-08-18 20:27:03,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:03,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319201496] [2020-08-18 20:27:03,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:03,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:27:03,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034245501] [2020-08-18 20:27:03,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:27:03,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:03,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:27:03,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:03,827 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-18 20:27:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:06,292 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-18 20:27:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:27:06,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-18 20:27:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:06,303 INFO L225 Difference]: With dead ends: 49 [2020-08-18 20:27:06,303 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 20:27:06,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:27:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 20:27:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-18 20:27:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 20:27:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-18 20:27:06,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-18 20:27:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:06,350 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-18 20:27:06,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:27:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-18 20:27:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 20:27:06,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:06,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:06,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:27:06,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-18 20:27:06,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:06,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995214023] [2020-08-18 20:27:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:06,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995214023] [2020-08-18 20:27:06,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:06,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 20:27:06,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876101042] [2020-08-18 20:27:06,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 20:27:06,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 20:27:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:27:06,937 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 13 states. [2020-08-18 20:27:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:09,488 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-08-18 20:27:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:27:09,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-18 20:27:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:09,490 INFO L225 Difference]: With dead ends: 48 [2020-08-18 20:27:09,491 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 20:27:09,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-18 20:27:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 20:27:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-08-18 20:27:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 20:27:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-18 20:27:09,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-08-18 20:27:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:09,500 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-18 20:27:09,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 20:27:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-18 20:27:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 20:27:09,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:09,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:09,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:27:09,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-08-18 20:27:09,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:09,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270767413] [2020-08-18 20:27:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270767413] [2020-08-18 20:27:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:09,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 20:27:09,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015984778] [2020-08-18 20:27:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:09,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:09,642 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-08-18 20:27:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:09,747 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-08-18 20:27:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:27:09,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 20:27:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:09,749 INFO L225 Difference]: With dead ends: 35 [2020-08-18 20:27:09,749 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 20:27:09,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 20:27:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-18 20:27:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 20:27:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-18 20:27:09,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-08-18 20:27:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:09,757 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-18 20:27:09,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-18 20:27:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 20:27:09,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:09,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:09,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:27:09,759 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-08-18 20:27:09,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:09,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410114873] [2020-08-18 20:27:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:09,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:09,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410114873] [2020-08-18 20:27:09,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:09,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 20:27:09,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173035150] [2020-08-18 20:27:09,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:09,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:09,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:09,951 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-18 20:27:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:12,155 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-18 20:27:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:27:12,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 20:27:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:12,158 INFO L225 Difference]: With dead ends: 34 [2020-08-18 20:27:12,158 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 20:27:12,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 20:27:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 20:27:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 20:27:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 20:27:12,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-08-18 20:27:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:12,171 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 20:27:12,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 20:27:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:27:12,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:12,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:12,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:27:12,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-08-18 20:27:12,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:12,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111906176] [2020-08-18 20:27:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:12,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111906176] [2020-08-18 20:27:12,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:12,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 20:27:12,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47683652] [2020-08-18 20:27:12,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:12,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:12,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:12,302 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-08-18 20:27:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:12,392 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-18 20:27:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:27:12,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 20:27:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:12,394 INFO L225 Difference]: With dead ends: 35 [2020-08-18 20:27:12,394 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 20:27:12,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 20:27:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 20:27:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 20:27:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-18 20:27:12,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-08-18 20:27:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:12,401 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-18 20:27:12,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-18 20:27:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:27:12,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:12,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:12,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:27:12,403 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-18 20:27:12,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:12,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676935853] [2020-08-18 20:27:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:13,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:13,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676935853] [2020-08-18 20:27:13,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:13,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 20:27:13,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117628025] [2020-08-18 20:27:13,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 20:27:13,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 20:27:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:27:13,168 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 15 states. [2020-08-18 20:27:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:15,909 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-18 20:27:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 20:27:15,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-08-18 20:27:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:15,911 INFO L225 Difference]: With dead ends: 33 [2020-08-18 20:27:15,911 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 20:27:15,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-08-18 20:27:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 20:27:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 20:27:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 20:27:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 20:27:15,919 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-08-18 20:27:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:15,919 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 20:27:15,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 20:27:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 20:27:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:27:15,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:15,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:15,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:27:15,921 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 2 times [2020-08-18 20:27:15,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:15,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523403145] [2020-08-18 20:27:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:16,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523403145] [2020-08-18 20:27:16,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:16,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:27:16,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027040133] [2020-08-18 20:27:16,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:27:16,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:27:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:16,032 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-08-18 20:27:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:16,186 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 20:27:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:27:16,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 20:27:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:16,188 INFO L225 Difference]: With dead ends: 40 [2020-08-18 20:27:16,188 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 20:27:16,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:27:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 20:27:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-18 20:27:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 20:27:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 20:27:16,202 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-08-18 20:27:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:16,204 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 20:27:16,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:27:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 20:27:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:27:16,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:16,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:16,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:27:16,207 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 937388738, now seen corresponding path program 1 times [2020-08-18 20:27:16,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:16,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029225914] [2020-08-18 20:27:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:20,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029225914] [2020-08-18 20:27:20,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:20,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:27:20,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970649967] [2020-08-18 20:27:20,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:27:20,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:27:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-18 20:27:20,567 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-18 20:27:22,701 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 26 [2020-08-18 20:27:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:26,973 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-08-18 20:27:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:27:26,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-18 20:27:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:26,974 INFO L225 Difference]: With dead ends: 39 [2020-08-18 20:27:26,974 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 20:27:26,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2020-08-18 20:27:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 20:27:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 20:27:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 20:27:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 20:27:26,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-08-18 20:27:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:26,982 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 20:27:26,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:27:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 20:27:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:27:26,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:26,983 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:26,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:27:26,983 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-18 20:27:26,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:26,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633637747] [2020-08-18 20:27:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 20:27:27,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633637747] [2020-08-18 20:27:27,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:27,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:27:27,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268337346] [2020-08-18 20:27:27,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:27:27,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:27:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:27,117 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-18 20:27:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:27,220 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-18 20:27:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:27:27,221 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 20:27:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:27,222 INFO L225 Difference]: With dead ends: 28 [2020-08-18 20:27:27,222 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:27:27,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:27:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:27:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:27:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:27:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:27:27,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 20:27:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:27,223 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:27:27,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:27:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:27:27,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:27:27,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:27:27,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:27:27,368 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:27:27,370 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-18 20:27:27,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:27:27,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:27:27,370 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-18 20:27:27,370 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:27:27,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-08-18 20:27:27,371 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-08-18 20:27:27,372 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-08-18 20:27:27,372 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-08-18 20:27:27,372 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 20:27:27,372 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse1 (div main_~l~0 4294967296)) (.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (let ((.cse3 (+ (* 4294967296 .cse0) main_~l~0)) (.cse2 (* 4294967296 .cse1))) (and (< .cse0 (+ .cse1 1)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2) .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2 1))))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 20:27:27,372 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-08-18 20:27:27,372 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-18 20:27:27,373 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 20:27:27,373 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 20:27:27,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:27:27 BoogieIcfgContainer [2020-08-18 20:27:27,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:27:27,404 INFO L168 Benchmark]: Toolchain (without parser) took 25099.67 ms. Allocated memory was 147.3 MB in the beginning and 262.7 MB in the end (delta: 115.3 MB). Free memory was 102.1 MB in the beginning and 204.5 MB in the end (delta: -102.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,405 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.94 ms. Allocated memory is still 147.3 MB. Free memory was 101.9 MB in the beginning and 91.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,407 INFO L168 Benchmark]: Boogie Preprocessor took 112.12 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,413 INFO L168 Benchmark]: RCFGBuilder took 326.97 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 167.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,414 INFO L168 Benchmark]: TraceAbstraction took 24408.93 ms. Allocated memory was 202.9 MB in the beginning and 262.7 MB in the end (delta: 59.8 MB). Free memory was 166.8 MB in the beginning and 204.5 MB in the end (delta: -37.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:27,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.94 ms. Allocated memory is still 147.3 MB. Free memory was 101.9 MB in the beginning and 91.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.12 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.97 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 167.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24408.93 ms. Allocated memory was 202.9 MB in the beginning and 262.7 MB in the end (delta: 59.8 MB). Free memory was 166.8 MB in the beginning and 204.5 MB in the end (delta: -37.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.1s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 277 SDslu, 225 SDs, 0 SdLazy, 613 SolverSat, 83 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 25 NumberOfFragments, 105 HoareAnnotationTreeSize, 17 FomulaSimplifications, 628 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 92 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 35421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 33/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...