/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:47:46,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:47:46,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:47:46,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 01:47:46,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:47:46,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:47:46,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:47:46,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:47:46,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:47:46,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:47:46,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:47:46,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:47:46,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:47:46,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:47:46,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:47:46,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:47:46,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:47:46,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:47:46,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:47:46,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:47:46,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:47:46,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:47:46,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:47:46,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:47:46,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:47:46,881 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:47:46,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:47:46,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:47:46,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:47:46,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:47:46,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:47:46,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:47:46,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:47:46,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:47:46,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:47:46,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:47:46,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:47:46,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:47:46,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:47:46,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:47:46,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:47:46,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:47:46,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:47:46,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:47:46,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:47:46,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:47:46,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:47:46,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:46,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:47:46,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:47:46,888 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:47:47,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:47:47,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:47:47,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:47:47,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:47:47,202 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:47:47,203 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-07-21 01:47:47,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebc48ad5/134539487d1746ea808fd33046a1e6ff/FLAG4fcc2fcb5 [2020-07-21 01:47:47,699 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:47:47,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i [2020-07-21 01:47:47,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebc48ad5/134539487d1746ea808fd33046a1e6ff/FLAG4fcc2fcb5 [2020-07-21 01:47:48,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebc48ad5/134539487d1746ea808fd33046a1e6ff [2020-07-21 01:47:48,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:47:48,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:47:48,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:47:48,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:47:48,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:47:48,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84390d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48, skipping insertion in model container [2020-07-21 01:47:48,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:47:48,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:47:48,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:47:48,306 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:47:48,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:47:48,344 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:47:48,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48 WrapperNode [2020-07-21 01:47:48,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:47:48,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:47:48,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:47:48,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:47:48,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... [2020-07-21 01:47:48,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:47:48,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:47:48,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:47:48,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:47:48,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 01:47:48,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:47:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:47:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:47:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:47:48,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:47:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:47:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:47:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:47:48,841 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:47:48,841 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:47:48,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:47:48 BoogieIcfgContainer [2020-07-21 01:47:48,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:47:48,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:47:48,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:47:48,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:47:48,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:47:48" (1/3) ... [2020-07-21 01:47:48,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4cfb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:47:48, skipping insertion in model container [2020-07-21 01:47:48,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:47:48" (2/3) ... [2020-07-21 01:47:48,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4cfb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:47:48, skipping insertion in model container [2020-07-21 01:47:48,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:47:48" (3/3) ... [2020-07-21 01:47:48,852 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-07-21 01:47:48,862 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:47:48,868 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:47:48,881 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:47:48,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:47:48,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:47:48,904 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:47:48,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:47:48,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:47:48,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:47:48,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:47:48,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:47:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 01:47:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:47:48,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:48,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:48,929 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1992019723, now seen corresponding path program 1 times [2020-07-21 01:47:48,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:48,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058730692] [2020-07-21 01:47:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:49,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:47:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:47:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:49,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:47:49,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058730692] [2020-07-21 01:47:49,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:47:49,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:47:49,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868467728] [2020-07-21 01:47:49,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:47:49,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:47:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:47:49,115 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-21 01:47:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:49,227 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-21 01:47:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:47:49,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:47:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:49,239 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:47:49,239 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:47:49,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:47:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:47:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 01:47:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:47:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-07-21 01:47:49,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-07-21 01:47:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:49,290 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-07-21 01:47:49,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:47:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-07-21 01:47:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:47:49,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:49,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:49,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:49,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2018685173, now seen corresponding path program 1 times [2020-07-21 01:47:49,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:49,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307746070] [2020-07-21 01:47:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:49,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:47:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:47:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:49,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:47:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:49,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:47:49,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:47:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:49,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307746070] [2020-07-21 01:47:49,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:47:49,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 01:47:49,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720350757] [2020-07-21 01:47:49,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:47:49,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:47:49,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:47:49,696 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2020-07-21 01:47:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:49,865 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-07-21 01:47:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:47:49,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 01:47:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:49,870 INFO L225 Difference]: With dead ends: 47 [2020-07-21 01:47:49,870 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 01:47:49,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:47:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 01:47:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-07-21 01:47:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 01:47:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-07-21 01:47:49,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 16 [2020-07-21 01:47:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:49,887 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-07-21 01:47:49,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:47:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-07-21 01:47:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:47:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:49,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:50,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:50,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 23130030, now seen corresponding path program 1 times [2020-07-21 01:47:50,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:50,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241324774] [2020-07-21 01:47:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:50,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:47:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:47:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:50,176 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:47:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:50,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:47:50,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:47:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:50,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241324774] [2020-07-21 01:47:50,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:47:50,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 01:47:50,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983574444] [2020-07-21 01:47:50,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:47:50,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:47:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:47:50,248 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 10 states. [2020-07-21 01:47:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:50,396 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-07-21 01:47:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:47:50,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-07-21 01:47:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:50,400 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:47:50,400 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 01:47:50,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:47:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 01:47:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-07-21 01:47:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 01:47:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-21 01:47:50,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 17 [2020-07-21 01:47:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:50,412 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-21 01:47:50,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:47:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-21 01:47:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:47:50,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:50,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:50,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:50,628 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -786216596, now seen corresponding path program 1 times [2020-07-21 01:47:50,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:50,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229319773] [2020-07-21 01:47:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:50,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:47:50,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:47:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:50,696 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:47:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:50,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:47:50,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:47:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:50,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229319773] [2020-07-21 01:47:50,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:47:50,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 01:47:50,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465837949] [2020-07-21 01:47:50,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:47:50,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:47:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:47:50,762 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 10 states. [2020-07-21 01:47:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:50,905 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2020-07-21 01:47:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:47:50,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-07-21 01:47:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:50,908 INFO L225 Difference]: With dead ends: 64 [2020-07-21 01:47:50,908 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 01:47:50,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:47:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 01:47:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 01:47:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 01:47:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-07-21 01:47:50,918 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 17 [2020-07-21 01:47:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:50,919 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-07-21 01:47:50,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:47:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-07-21 01:47:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:47:50,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:50,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:51,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:51,136 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash -986746962, now seen corresponding path program 1 times [2020-07-21 01:47:51,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:51,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585412667] [2020-07-21 01:47:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:51,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:47:51,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:47:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:47:51,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:47:51,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585412667] [2020-07-21 01:47:51,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:47:51,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:47:51,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814141299] [2020-07-21 01:47:51,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:47:51,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:47:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:47:51,204 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2020-07-21 01:47:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:51,234 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-07-21 01:47:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:47:51,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 01:47:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:51,236 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:47:51,236 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 01:47:51,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:47:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 01:47:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 01:47:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:47:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 01:47:51,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2020-07-21 01:47:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:51,245 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 01:47:51,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:47:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 01:47:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 01:47:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:47:51,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:47:51,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:51,462 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:47:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:47:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1055644043, now seen corresponding path program 1 times [2020-07-21 01:47:51,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:47:51,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554643812] [2020-07-21 01:47:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:51,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:47:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:47:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:47:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:47:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:47:51,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:47:51,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554643812] [2020-07-21 01:47:51,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:47:51,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:47:51,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317982041] [2020-07-21 01:47:51,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:47:51,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:47:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:47:51,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:47:51,539 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-21 01:47:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:47:51,561 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-21 01:47:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:47:51,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-21 01:47:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:47:51,562 INFO L225 Difference]: With dead ends: 34 [2020-07-21 01:47:51,562 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:47:51,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:47:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:47:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:47:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:47:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:47:51,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-07-21 01:47:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:47:51,565 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:47:51,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:47:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:47:51,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:47:51,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:47:51,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:47:52,171 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:47:52,171 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:47:52,171 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:47:52,171 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:47:52,171 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:47:52,171 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:47:52,172 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:47:52,172 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:47:52,172 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:47:52,172 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:47:52,172 INFO L264 CegarLoopResult]: At program point L35-2(lines 35 39) the Hoare annotation is: (let ((.cse3 (<= 0 main_~j~0)) (.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 4000 main_~c1~0)) (.cse2 (<= 2000 main_~c2~0)) (.cse4 (< main_~n~0 2)) (.cse5 (<= 1 main_~i~0))) (or (and .cse0 (<= 2000 main_~k~0) .cse1 .cse2 .cse3 .cse4 .cse5) (and (<= main_~i~0 0) (<= main_~n~0 0) .cse3) (and .cse0 (<= 1 main_~j~0) .cse1 .cse2 (< 0 main_~k~0) .cse4 .cse5))) [2020-07-21 01:47:52,172 INFO L268 CegarLoopResult]: For program point L35-3(lines 35 39) no Hoare annotation was computed. [2020-07-21 01:47:52,173 INFO L268 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2020-07-21 01:47:52,173 INFO L268 CegarLoopResult]: For program point L27(lines 27 32) no Hoare annotation was computed. [2020-07-21 01:47:52,173 INFO L264 CegarLoopResult]: At program point L29-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 4000 main_~c1~0)) (.cse2 (<= 2000 main_~c2~0))) (or (and (<= main_~i~0 0) .cse0 (<= 0 main_~i~0) .cse1 .cse2 (<= 0 main_~k~0)) (and .cse0 (<= 2000 main_~k~0) .cse1 .cse2 (< main_~n~0 2) (<= 1 main_~i~0)))) [2020-07-21 01:47:52,173 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 41) no Hoare annotation was computed. [2020-07-21 01:47:52,173 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 33) no Hoare annotation was computed. [2020-07-21 01:47:52,173 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 41) no Hoare annotation was computed. [2020-07-21 01:47:52,174 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 2000 main_~k~0) (<= 4000 main_~c1~0) (<= 2000 main_~c2~0) (<= 0 main_~j~0) (< main_~n~0 2) (<= 1 main_~i~0)) [2020-07-21 01:47:52,174 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-07-21 01:47:52,174 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 41) the Hoare annotation is: true [2020-07-21 01:47:52,174 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-07-21 01:47:52,174 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 01:47:52,174 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 01:47:52,174 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:47:52,175 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 01:47:52,175 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 01:47:52,175 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:47:52,175 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 01:47:52,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:47:52 BoogieIcfgContainer [2020-07-21 01:47:52,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:47:52,196 INFO L168 Benchmark]: Toolchain (without parser) took 4099.68 ms. Allocated memory was 147.3 MB in the beginning and 242.7 MB in the end (delta: 95.4 MB). Free memory was 104.3 MB in the beginning and 180.3 MB in the end (delta: -76.0 MB). Peak memory consumption was 101.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,197 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.3 MB in the beginning and 122.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.11 ms. Allocated memory is still 147.3 MB. Free memory was 104.1 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,199 INFO L168 Benchmark]: Boogie Preprocessor took 112.77 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 183.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,200 INFO L168 Benchmark]: RCFGBuilder took 386.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 168.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,201 INFO L168 Benchmark]: TraceAbstraction took 3347.48 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 168.3 MB in the beginning and 180.3 MB in the end (delta: -12.0 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:47:52,205 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.3 MB in the beginning and 122.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.11 ms. Allocated memory is still 147.3 MB. Free memory was 104.1 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.77 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 183.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 386.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 168.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3347.48 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 168.3 MB in the beginning and 180.3 MB in the end (delta: -12.0 MB). Peak memory consumption was 108.7 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: 23]: Loop Invariant Derived loop invariant: (((((i <= 0 && 10000 <= c3) && 0 <= i) && 4000 <= c1) && 2000 <= c2) && 0 <= k) || (((((10000 <= c3 && 2000 <= k) && 4000 <= c1) && 2000 <= c2) && n < 2) && 1 <= i) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((10000 <= c3 && 2000 <= k) && 4000 <= c1) && 2000 <= c2) && 0 <= j) && n < 2) && 1 <= i) || ((i <= 0 && n <= 0) && 0 <= j)) || ((((((10000 <= c3 && 1 <= j) && 4000 <= c1) && 2000 <= c2) && 0 < k) && n < 2) && 1 <= i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 168 SDslu, 437 SDs, 0 SdLazy, 276 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, 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, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 121 HoareAnnotationTreeSize, 14 FomulaSimplifications, 312 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 88 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 7160 SizeOfPredicates, 15 NumberOfNonLiveVariables, 373 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 21/27 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...