/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:56:20,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:56:20,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:56:20,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:56:20,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:56:20,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:56:20,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:56:20,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:56:20,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:56:20,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:56:20,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:56:20,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:56:20,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:56:20,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:56:20,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:56:20,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:56:20,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:56:20,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:56:20,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:56:20,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:56:20,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:56:20,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:56:20,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:56:20,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:56:20,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:56:20,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:56:20,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:56:20,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:56:20,916 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 16:56:20,931 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:56:20,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:56:20,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:56:20,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:56:20,933 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:56:20,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:56:20,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:56:20,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:56:20,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:56:20,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:56:20,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:56:20,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:56:20,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:56:20,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:56:20,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:56:20,935 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:56:20,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:56:20,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:56:20,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:56:20,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:56:20,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:56:20,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:56:20,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:56:20,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:56:20,938 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 -> NUM_VARIABLES 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 -> 2 [2020-07-21 16:56:21,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:56:21,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:56:21,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:56:21,232 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:56:21,232 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:56:21,233 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c [2020-07-21 16:56:21,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fce5ba4c2/29782cec63164fd5a5c4bf801db71857/FLAGd4a916b9f [2020-07-21 16:56:21,752 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:56:21,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c [2020-07-21 16:56:21,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fce5ba4c2/29782cec63164fd5a5c4bf801db71857/FLAGd4a916b9f [2020-07-21 16:56:22,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fce5ba4c2/29782cec63164fd5a5c4bf801db71857 [2020-07-21 16:56:22,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:56:22,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:56:22,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:22,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:56:22,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:56:22,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2145e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22, skipping insertion in model container [2020-07-21 16:56:22,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:56:22,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:56:22,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:22,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:56:22,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:22,420 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:56:22,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22 WrapperNode [2020-07-21 16:56:22,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:22,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:56:22,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:56:22,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:56:22,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (1/1) ... [2020-07-21 16:56:22,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:56:22,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:56:22,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:56:22,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:56:22,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (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 16:56:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:56:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:56:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:56:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:56:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:56:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:56:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:56:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:56:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:56:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:56:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:56:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:56:22,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:56:22,825 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:56:22,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:22 BoogieIcfgContainer [2020-07-21 16:56:22,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:56:22,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:56:22,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:56:22,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:56:22,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:56:22" (1/3) ... [2020-07-21 16:56:22,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464bd662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:22, skipping insertion in model container [2020-07-21 16:56:22,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:22" (2/3) ... [2020-07-21 16:56:22,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464bd662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:22, skipping insertion in model container [2020-07-21 16:56:22,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:22" (3/3) ... [2020-07-21 16:56:22,839 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i.v+lhb-reducer.c [2020-07-21 16:56:22,852 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:56:22,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 16:56:22,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 16:56:22,911 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:56:22,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:56:22,911 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:56:22,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:56:22,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:56:22,912 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:56:22,912 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:56:22,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:56:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 16:56:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 16:56:22,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:22,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:22,941 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1747837512, now seen corresponding path program 1 times [2020-07-21 16:56:22,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:22,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714128339] [2020-07-21 16:56:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:56:23,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:56:23,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:23,102 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,111 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,131 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 16:56:23,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:23,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714128339] [2020-07-21 16:56:23,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:23,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:56:23,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616043849] [2020-07-21 16:56:23,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:56:23,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:56:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:56:23,154 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-07-21 16:56:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:23,232 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-07-21 16:56:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:56:23,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 16:56:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:23,245 INFO L225 Difference]: With dead ends: 30 [2020-07-21 16:56:23,245 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 16:56:23,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 16:56:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 16:56:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:56:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 16:56:23,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-21 16:56:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:23,291 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 16:56:23,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:56:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 16:56:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:56:23,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:23,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:23,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:23,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash -339542086, now seen corresponding path program 1 times [2020-07-21 16:56:23,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:23,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273059707] [2020-07-21 16:56:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:56:23,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:56:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:23,567 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,570 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,580 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 16:56:23,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:23,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273059707] [2020-07-21 16:56:23,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:23,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:56:23,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810475450] [2020-07-21 16:56:23,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:56:23,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:56:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:56:23,585 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-07-21 16:56:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:23,629 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-07-21 16:56:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:56:23,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 16:56:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:23,631 INFO L225 Difference]: With dead ends: 19 [2020-07-21 16:56:23,631 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 16:56:23,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 16:56:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-07-21 16:56:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 16:56:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 16:56:23,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-07-21 16:56:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:23,638 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 16:56:23,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:56:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 16:56:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:56:23,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:23,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:23,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:23,841 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash 117666302, now seen corresponding path program 1 times [2020-07-21 16:56:23,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:23,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532224633] [2020-07-21 16:56:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:56:23,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:23,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:56:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:23,923 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 16:56:23,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,939 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:23,955 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 16:56:23,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:23,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532224633] [2020-07-21 16:56:23,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:23,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:56:23,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145172210] [2020-07-21 16:56:23,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:56:23,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:56:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:23,962 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-07-21 16:56:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:24,108 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-07-21 16:56:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:56:24,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 16:56:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:24,110 INFO L225 Difference]: With dead ends: 25 [2020-07-21 16:56:24,110 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:56:24,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:56:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:56:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:56:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:56:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:56:24,112 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-21 16:56:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:24,113 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:56:24,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:56:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:56:24,113 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:56:24,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:24,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:56:24,494 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:56:24,494 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:56:24,494 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:56:24,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:56:24,495 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:56:24,495 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:56:24,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:56:24,495 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:56:24,496 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 16:56:24,507 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:56:24,507 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:56:24,507 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point L31(lines 31 87) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point L62(line 62) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L264 CegarLoopResult]: At program point L93(lines 12 100) the Hoare annotation is: (<= 0 main_~main__i~0) [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point L60(lines 60 68) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 100) no Hoare annotation was computed. [2020-07-21 16:56:24,508 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-21 16:56:24,509 INFO L264 CegarLoopResult]: At program point L77(lines 50 85) the Hoare annotation is: (and (<= 1 main_~__VERIFIER_assert__cond~1) (< main_~main__i~0 main_~main__nlen~0) (<= 1 main_~__VERIFIER_assert__cond~0) (<= 0 main_~main__i~0)) [2020-07-21 16:56:24,509 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 100) no Hoare annotation was computed. [2020-07-21 16:56:24,509 INFO L268 CegarLoopResult]: For program point L44(lines 44 85) no Hoare annotation was computed. [2020-07-21 16:56:24,509 INFO L264 CegarLoopResult]: At program point L67(lines 37 87) the Hoare annotation is: (let ((.cse0 (< main_~main__i~0 main_~main__nlen~0)) (.cse1 (<= 0 main_~main__i~0))) (or (and (= 1 main_~__VERIFIER_assert__cond~2) .cse0 (<= 1 main_~__VERIFIER_assert__cond~0) .cse1) (and .cse0 (= 1 main_~__VERIFIER_assert__cond~0) .cse1))) [2020-07-21 16:56:24,509 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2020-07-21 16:56:24,510 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 62) no Hoare annotation was computed. [2020-07-21 16:56:24,510 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 100) the Hoare annotation is: true [2020-07-21 16:56:24,510 INFO L268 CegarLoopResult]: For program point L24(lines 24 94) no Hoare annotation was computed. [2020-07-21 16:56:24,510 INFO L268 CegarLoopResult]: For program point L74(lines 74 83) no Hoare annotation was computed. [2020-07-21 16:56:24,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:56:24 BoogieIcfgContainer [2020-07-21 16:56:24,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:56:24,532 INFO L168 Benchmark]: Toolchain (without parser) took 2378.33 ms. Allocated memory was 144.7 MB in the beginning and 233.8 MB in the end (delta: 89.1 MB). Free memory was 101.1 MB in the beginning and 203.7 MB in the end (delta: -102.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,533 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.26 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,535 INFO L168 Benchmark]: Boogie Preprocessor took 119.22 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.7 MB in the beginning and 180.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,536 INFO L168 Benchmark]: RCFGBuilder took 290.48 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 166.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,537 INFO L168 Benchmark]: TraceAbstraction took 1697.07 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 166.1 MB in the beginning and 203.7 MB in the end (delta: -37.6 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:56:24,542 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.26 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.22 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.7 MB in the beginning and 180.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.48 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 166.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1697.07 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 166.1 MB in the beginning and 203.7 MB in the end (delta: -37.6 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 33]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 62]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 0 <= main__i - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: ((1 <= __VERIFIER_assert__cond && main__i < main__nlen) && 1 <= __VERIFIER_assert__cond) && 0 <= main__i - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((1 == __VERIFIER_assert__cond && main__i < main__nlen) && 1 <= __VERIFIER_assert__cond) && 0 <= main__i) || ((main__i < main__nlen && 1 == __VERIFIER_assert__cond) && 0 <= main__i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 52 SDslu, 54 SDs, 0 SdLazy, 54 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 12 NumberOfFragments, 44 HoareAnnotationTreeSize, 7 FomulaSimplifications, 112 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 933 SizeOfPredicates, 13 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...