/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:25:03,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:25:03,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:25:03,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 06:25:03,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:25:03,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:25:03,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:25:03,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:25:03,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:25:03,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:25:03,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:25:03,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:25:03,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:25:03,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:25:03,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:25:03,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:25:03,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:25:03,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:25:03,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:25:03,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:25:03,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:25:03,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 06:25:03,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:25:03,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:25:03,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:25:03,799 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 [2020-08-22 06:25:03,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:25:03,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:25:03,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:25:03,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:25:03,822 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:25:03,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:25:03,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:25:03,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:25:03,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:25:03,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:25:03,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:25:03,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:25:03,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:25:03,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:25:03,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:25:03,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:25:03,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:25:03,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:25:03,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:25:03,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:25:03,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:25:03,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:25:03,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:25:03,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:25:03,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:25:03,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:25:03,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:25:03,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:25:03,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:25:03,827 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:25:04,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:25:04,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:25:04,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:25:04,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:25:04,166 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:25:04,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-08-22 06:25:04,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23fc0d8d4/aa794cfc76ec49058a449cbf05f17960/FLAG40b3c7882 [2020-08-22 06:25:04,692 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:25:04,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1.i [2020-08-22 06:25:04,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23fc0d8d4/aa794cfc76ec49058a449cbf05f17960/FLAG40b3c7882 [2020-08-22 06:25:05,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23fc0d8d4/aa794cfc76ec49058a449cbf05f17960 [2020-08-22 06:25:05,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:25:05,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:25:05,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:25:05,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:25:05,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:25:05,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce0c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05, skipping insertion in model container [2020-08-22 06:25:05,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:25:05,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:25:05,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:25:05,360 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:25:05,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:25:05,398 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:25:05,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05 WrapperNode [2020-08-22 06:25:05,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:25:05,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:25:05,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:25:05,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:25:05,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (1/1) ... [2020-08-22 06:25:05,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:25:05,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:25:05,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:25:05,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:25:05,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (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 [2020-08-22 06:25:05,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:25:05,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:25:05,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 06:25:05,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 06:25:05,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:25:05,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:25:05,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:25:05,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:25:05,809 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:25:05,810 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 06:25:05,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:25:05 BoogieIcfgContainer [2020-08-22 06:25:05,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:25:05,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:25:05,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:25:05,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:25:05,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:25:05" (1/3) ... [2020-08-22 06:25:05,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484e9db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:25:05, skipping insertion in model container [2020-08-22 06:25:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:25:05" (2/3) ... [2020-08-22 06:25:05,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484e9db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:25:05, skipping insertion in model container [2020-08-22 06:25:05,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:25:05" (3/3) ... [2020-08-22 06:25:05,823 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-08-22 06:25:05,835 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:25:05,843 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:25:05,859 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:25:05,886 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:25:05,886 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:25:05,886 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:25:05,886 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:25:05,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:25:05,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:25:05,887 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:25:05,887 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:25:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-22 06:25:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 06:25:05,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:25:05,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:25:05,927 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:25:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:25:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-08-22 06:25:05,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:25:05,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732356063] [2020-08-22 06:25:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:25:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:25:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:25:06,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732356063] [2020-08-22 06:25:06,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:25:06,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:25:06,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449267010] [2020-08-22 06:25:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:25:06,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:25:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:25:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:25:06,159 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-08-22 06:25:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:25:06,194 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-22 06:25:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:25:06,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 06:25:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:25:06,205 INFO L225 Difference]: With dead ends: 33 [2020-08-22 06:25:06,205 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 06:25:06,208 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 [2020-08-22 06:25:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 06:25:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-08-22 06:25:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 06:25:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-22 06:25:06,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-08-22 06:25:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:25:06,249 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-22 06:25:06,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:25:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-22 06:25:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 06:25:06,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:25:06,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:25:06,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:25:06,251 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:25:06,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:25:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-08-22 06:25:06,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:25:06,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881480735] [2020-08-22 06:25:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:25:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:25:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:25:06,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881480735] [2020-08-22 06:25:06,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:25:06,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 06:25:06,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889467535] [2020-08-22 06:25:06,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:25:06,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:25:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:25:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:25:06,304 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-08-22 06:25:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:25:06,332 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-22 06:25:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:25:06,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-22 06:25:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:25:06,334 INFO L225 Difference]: With dead ends: 21 [2020-08-22 06:25:06,335 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 06:25:06,336 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 [2020-08-22 06:25:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 06:25:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-22 06:25:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 06:25:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 06:25:06,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-08-22 06:25:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:25:06,342 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 06:25:06,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:25:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 06:25:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 06:25:06,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:25:06,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:25:06,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:25:06,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:25:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:25:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1942427985, now seen corresponding path program 2 times [2020-08-22 06:25:06,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:25:06,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106848524] [2020-08-22 06:25:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:25:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:25:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:25:06,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106848524] [2020-08-22 06:25:06,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:25:06,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:25:06,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407723815] [2020-08-22 06:25:06,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:25:06,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:25:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:25:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:25:06,419 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 06:25:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:25:06,448 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-08-22 06:25:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:25:06,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 06:25:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:25:06,450 INFO L225 Difference]: With dead ends: 23 [2020-08-22 06:25:06,450 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 06:25:06,451 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 [2020-08-22 06:25:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 06:25:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-08-22 06:25:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 06:25:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 06:25:06,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-08-22 06:25:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:25:06,457 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 06:25:06,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:25:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 06:25:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 06:25:06,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:25:06,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:25:06,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:25:06,459 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:25:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:25:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1522126099, now seen corresponding path program 3 times [2020-08-22 06:25:06,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:25:06,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884961945] [2020-08-22 06:25:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:25:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:25:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:25:06,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884961945] [2020-08-22 06:25:06,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:25:06,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 06:25:06,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368584385] [2020-08-22 06:25:06,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:25:06,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:25:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:25:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:25:06,530 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 06:25:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:25:06,569 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-08-22 06:25:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:25:06,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 06:25:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:25:06,571 INFO L225 Difference]: With dead ends: 25 [2020-08-22 06:25:06,571 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 06:25:06,572 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 [2020-08-22 06:25:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 06:25:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-08-22 06:25:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 06:25:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-22 06:25:06,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-08-22 06:25:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:25:06,578 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-22 06:25:06,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:25:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-22 06:25:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 06:25:06,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:25:06,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:25:06,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:25:06,580 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:25:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:25:06,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1338939477, now seen corresponding path program 4 times [2020-08-22 06:25:06,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:25:06,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754101929] [2020-08-22 06:25:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:25:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:25:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:25:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 06:25:06,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754101929] [2020-08-22 06:25:06,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:25:06,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 06:25:06,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303198018] [2020-08-22 06:25:06,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:25:06,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:25:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:25:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:25:06,693 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-08-22 06:25:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:25:06,724 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-22 06:25:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:25:06,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-08-22 06:25:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:25:06,725 INFO L225 Difference]: With dead ends: 19 [2020-08-22 06:25:06,725 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:25:06,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:25:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:25:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:25:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:25:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:25:06,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-08-22 06:25:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:25:06,727 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:25:06,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:25:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:25:06,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:25:06,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:25:06,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:25:06,772 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 06:25:06,772 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:25:06,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:25:06,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 06:25:06,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 06:25:06,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 06:25:06,773 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 06:25:06,774 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 06:25:06,774 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-22 06:25:06,774 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 06:25:06,774 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 18) the Hoare annotation is: true [2020-08-22 06:25:06,774 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 18) no Hoare annotation was computed. [2020-08-22 06:25:06,774 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-22 06:25:06,775 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-08-22 06:25:06,775 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 18) no Hoare annotation was computed. [2020-08-22 06:25:06,775 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (<= main_~i~0 1000000) [2020-08-22 06:25:06,775 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (and (<= main_~i~0 1000000) (< 999999 main_~i~0)) [2020-08-22 06:25:06,776 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 06:25:06,776 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-22 06:25:06,776 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 06:25:06,776 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-22 06:25:06,776 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-22 06:25:06,777 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-22 06:25:06,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:25:06 BoogieIcfgContainer [2020-08-22 06:25:06,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:25:06,796 INFO L168 Benchmark]: Toolchain (without parser) took 1721.39 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 103.2 MB in the beginning and 107.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,797 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.95 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,799 INFO L168 Benchmark]: Boogie Preprocessor took 38.20 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,800 INFO L168 Benchmark]: RCFGBuilder took 374.58 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.1 MB in the beginning and 170.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,801 INFO L168 Benchmark]: TraceAbstraction took 977.76 ms. Allocated memory is still 203.4 MB. Free memory was 170.2 MB in the beginning and 107.2 MB in the end (delta: 63.0 MB). Peak memory consumption was 63.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:25:06,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.95 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.20 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.58 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.1 MB in the beginning and 170.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 977.76 ms. Allocated memory is still 203.4 MB. Free memory was 170.2 MB in the beginning and 107.2 MB in the end (delta: 63.0 MB). Peak memory consumption was 63.0 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: 15]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 14 SDslu, 105 SDs, 0 SdLazy, 55 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 15 HoareAnnotationTreeSize, 11 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 1581 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 16/30 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...